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1892, on decayed branches in Caddington Wood. The plasinodium is pale yellow, sometimes showing a greenish hue when creeping over a lichen-covered surface. It occurs in anastomosing veins, which often assume a fan-shape at the extremities. On several occasions the plasmodium crept into the interstices of the rotten wood, remaining there for several days before its final emergence, prior to the formation of its sporangia. So deceptive was this habit, with the fact that slimy refuse remained on the spot it had formerly occupied, that Mr. Lister as well as myself supposed that our specimens were dead. Another interesting record is that of Physurum calidris, which fully confirms Mr. Lister's former determi. nation of this species as British, from the very scanty material to which he previously had access.

All the twenty-seven forms enumerated for Heath near Leighton were collected by Miss L. Bassett and Miss G. Lister. These gatherings include the rare British species Budhamia rubiginosa and Pirticularia Pozeanı. The species in the following list marked C. C. were collected by Mr. C. Crouch, whose accurate and persistent observations have added largely to our knowledge both of the flowering and flowerless plants of S. Beds. The Hertfordshire species marked A. E. G. liave been obtained by Mr. A. E. Gibbs, F.L.S.; those marked H. E. S. by Mr. H. E. Seebolım. Nor should I omit to notice the efforts of my son, who has not only been successful in our joint excursions, but also in those he has taken independently. "Common" applies to both counties; when no time of fruiting is named, the whole year is intended.

As a guarantee of accuracy in naming, it need only be said that all specimens on which a record is based have been examined by Mr. A. Lister, or by his daughter, Miss G. Lister, to both of whom my thanks are due for their valuable assistance. Mr. Lister has also kindly read this paper in MS., and has added one or two localities. Voucher specimens of most of the rarer forms have been prepared for the British Museum Herbarium.

Ceratiun hydnoides A. & S. Hitchin, Herts.
Physarum leucophæum (Fr.). Common.

P. nutans Pers. (Tilmadoche nutans Rost.). Luton Hoo, Beds ; Hitchin and Caddington, Herts.

P. riride Pers. (Tilmadoche mutabilis Rost.). Heath, Stopsley, Luton Hoo, Beds; Kensworth, Herts.

P. compressum A. & S. Luton Hoo; Hitchin (stalked and plasmodiocarp forms from dirty white plasmodium, H. E.S.).

P. calidris List. Very rare. (See Journ. Bot. 1891, 258). Pulloxhill, Beds. Fruiting in summer.

Craterium vulgare Ditm. Heath, Stopsley, Pepperstock, Beds.; Hitchin, Herts. Fruiting in summer and autumi.

C. leucocephalum (Pers.) Rost. Pepperstock, Totternhoe, Beds. Fruiting in autumn.

Leocarpus frayilis (Dicks.) Rost. Heath, Ampthill, and Pepperstock Woods. Fruiting in summer and autumn.

Fuligo septica (Link) Gmel. Kitchen End (C. C.), Luton Hoo, Beds.

Badhamia panicea (Fr.) Rost. Luton Hoo; Hitchin. Fruiting in summer.

B. hyalina (Pers.) Berk. Heath, Caddington, Beds. Fruiting in summer and winter.

B. utricularis (Bull.) Berk. (plasmodium full yellow). Heath, Caddington.

B. rubiginosa (Chev.) Rost. Heath. Fruiting in winter.

B. inaurata Curr. (plasmodium pale yellow). Caddington, rare. Fruiting in winter.

Didymium microcarpon (Fr.) Rost. Kitchen End (C.C.). Fruiting in autumn.

D. squamulosum (A. & S.) Fr. Sundon, Luton Hoo, Kitchen End (C.C.), Beds; Hitchin (H.E.S.), Ayers End (A. E.G.), Herts. Fruiting in summer and autumn.

D. farinaceum Schrad. Heath. Fruiting in summer and winter. D. pertusum Berk. Clophill, Beds. Fruiting in autumn.

Chrondrioderma difforme (Pers.) Rost. Heath, Luton; Hitchin. Fruiting in autumn and winter.

C. testaceum (Schrad.) Rost. (first British record). Stopsley, Beds. Fruiting in summer.

C. radiutum (Linn.) Rost. Heath, Pepperstock. Fruiting in winter.

Lepidoderma tigrinum (Schrad.) Rost. Heath. Fruiting in winter.

Stemnonites fusca Roth. Heath, Luton Hoo, Sundon, Beds; Kensworth, Herts.

S. ferruyinea (Ehrh.). Chalton, Pepperstock, Kitchen End. Fruiting in summer.

Comatrichia typhina (Roth.) Rost. Luton Hoo, Stopsley; Hitchin (H. E. S.). Fruiting in summer and antumn.

C. Friesiana De Bary. Heath, Leagrave, Pepperstock; Ayers End (A. E. G.). Fruiting in sumuner and autumn.

Lamproderma physarvides (A. & S.) Rost. Heath. Fruiting in winter.

L. irideum (Cke.) Mass. Hitchin.

Enerthenema papillatum (Pers.) Rost. Caddington, Luton Hoo. Fruiting in summer.

Tubulina cylindrica (Bull.) DC. Kitchen End (C. C.). Fruiting in summer.

Enteridium olivaceum (Elr.). Heath. Fruiting in winter.

Dictydium cernuum (Pers.) Nees. Luton Hoo, Chalton. Fruiting in summer and autumn.

Cribraria aurantiaca Schrad. and C. argillacea Pers. (plasmodinu slate coloured). Heath, Luton Hoo. Fruitivg in spring and summer.

Reticularia lycoperdon Bull. Luton Hoo. Fruiting in summer.

R. Rozeana Rost. (See Journ. Bot. 1891, 263). Heath. Fruiting in spring.

Trichia fallax Pers. Heath, Sundon, near Luton, Luton Hoo.

T. fragilis (Sow.) Rost. Heath, Pepperstock; Bricket Wood, Ayers End (A. E. G.), Herts. Fruiting in autumn.

T. scabra Rost. Sewell, Beds. Fruiting in autumu.
T. varia Pers. Heath, ncar Luton, Leagrave. Fruiting in

autumn. — v. nigripes. Wheathampstead, Herts. Fruiting in spring.

T. contorta (Dit.) Rost. Rare. Caddington, Beds. Fruiting in spring

T. affinis De Bary. Heath, Sundon, near Luton; Wheathampstead, Harpenden, Kensworth, Ayers End (A. E. G.). Fruiting in spring.

T. Jackii Rost. Heath, Pepperstock, near Luton; Bricket and Zouches Woods, Herts. Fruiting in autumn and winter.

Prototrichia flagellifer (B. & Br.) Rost. Heath. Fruiting in winter.

Hemiarcyria rubiformis (Pers.) Rost. Kitchen End (C. C.), Barton Springs, Beds. Fruiting in spring and autumn. – Var. Neesiana. Barton Springs. Fruiting in autumn.

H. intorta List. Hitchin.
H. clavata (Pers.) Rost. Wheatlampstead. Fruiting in spring.
Arcyria punicea Pers. Common. Fruiting in autumn.

A. cinerea (Bull.) Schum. Luton Hoo, Stopsley. Fruiting in summer.

A. incarnata Pers. Heath, Barton Springs, Caddington, Beds; Kensworth, Herts. Fruiting in autumn.

A. nutans (Bull.) Grev. Caddington, Luton Hoo. Fruiting in summer.

A. ferruginea Sauter. Heath. Fruiting in winter.

Lycogala epidendrum (Buxb.). Luton Hoo, Kitchen End (C. C.), Sharpenoe, Beds. Fruiting in summer.

The following Mycetozoa were observed in the New Forest, Hants, August, 1892:

Physarum leucophæum Fr,
Stemonitis ferruginea Ehrh. var, microspora.
S. splendens var. confluens.
Dictydium cernuum (Pers.) Nees.
Arcyria nutans (Bull.) Grev.
Trichia fallax Pers.
Lycogalu epidendrum Buxb.

The Hants notes having been made after a long period of dry weather, will account for the fewness of the species. The list would doubtless be largely extended if a visit to the same locality were made in the autumn or winter. The most noteworthy record is that of Stemonitis splendens, on which see note by Mr. A. Lister in Journ. Bot. 1891, 262.

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BY THE REV. AUGUSTIN LEY, M.A. Rubus acutifrons, n. sp. - References : Botanical Exchange Club Reports, 1890, p. 294; 1891. pp. 331, 352 ; sub nomine R. Lintoni Focke.--Stem, when growing in open woods, forming a low arch, angular throughout, striate, reddish or brownish green in exposure; not pruinose, slightly lairy, with few or many stalked glands, and many short, tubercular-based acicles. Prickles many, the larger nearly equal, mostly but not always confined to the angles, deflexed, from long compressed dilated bases. Leaves Hat, quinate-pedate, occasionally ternate, opaque, thin, nearly naked above, green and thinly hairy, not felted beneath. Leaflets not imbricate, the basal oval, intermediate obovate-acuminate, terminal broadly elliptic or subrotund, often irregularly but deeply inciselobate in the upper half, with long acuminate point. Ordinary serrations rather shallow, nearly simple, with acute forwardpointing teeth. Petioles with many slender acicles and stalked glands, few slender declining prickles, and short hair. Stipules short, linear, fringed with stalked glands. Panicle long, compound, very lax but with the flowers remarkably aggregated ; lower branches racemose-corymbose, intermediate cymose or pseudoumbellate; corymbose above. Rachis wavy, with many slender deflexed prickles, stalked glands and patent hairs, especially in the upper part; slightly felted, but not grey with felt. Sepals ovate cuspidate-acuminate, clothed and coloured like the rachis, dark, with pale margins, strongly ascending after the petals fall. Petals rather small, obovate, pinkish ; stamens white, exceeding the green styles. Fruit well formed, round, acid.

Habitat.-Woods. Not noticed in hedges, or in the open country. Localities-Rigg's Wood, Sellack; Coldborough Park Wood, Yatton; Haugh Wood, Mordiford ; Belmont Woods, Hereford. All these localities are in Herefordshire, and lie within a radius of ten or twelve miles; the plant is abundant, and retains its characters well in each of them. I have had it under observation now for five seasons.

From the above description it will be seen that this plant approaches R. Lintoni Focke, especially in the shape of the leaves, and the glandular clothing of the rachis. I considered it to be R. Lintoni when I first found it; and a reference to the Exchange Club Reports will show that Prof. Babington partly concurred in this opinion. The resemblance, however, is mainly superficial, and the essential differences, especially in the glandular clothing of the stem, the quinate leaves, and the uniformly much more largely developed panicle, justify the adoption of a new name.

A series of this plant, submitted to Dr. Focke in the autumn of 1892, elicited from him the following remarks, which he has kindly allowed me to make public :

The Rubus sent agrees very well indeed with a plant I have known for twenty-five years. Besides the difference of colour in the petals, I see not the least appreciable difference. I think, there. fore, that I know the plant, but I know_no name Synopsis Rub. Germ., published in 1877, I mentioned it (p. 361) under R. Betckei ; but as that is a very local and little known form, which has not been identified with any more constant species, it will not be advisable to make use of this name.”

The Rev. W. M. Rogers suggests an affinity in our plant to R. viriilis Kalt. ; and in this suggestion Dr. Focke concurs.

In my

Rubus ochrodermis, n. sp.-- References : Botanical Exchange Club Reports, 1889, pp. 257, 258; 1890, p. 294; 1891, p. 330.Stem extensively creeping when unsupported, thick at the base, often branching, ochreous, becoming dark brown-red in exposure, bluntly angular, striate, hairless or nearly so. Prickles many, unequal, not confined to the angles, the largest 4 inch long, declining, slightly deflexed towards the end of the stem, from rather broad bases, rather blunt, soon losing their points, and appearing on the old stems as pointless tubercles; passing into unequal, mostly eglandular acicles and minute bristles; all these organs being of an ochreous yellow. Leaves nearly always ternate, very rarely quinatepedate; lateral leaflets roundly obovate-mucronate, gibbous below, and occasionally lobed, their petiolules very short, nearly patent, or rarely even divaricate; terminal rather long-petioled, roundly obovate-mucronate. All the leaflets nearly equal in size, flat, green on both sides, veins prominent below. Upper surface with a few scattered hairs ; under with thin, harsh, curling hair ; serration nearly simple, irregular, the larger teeth inclining backwards. Petioles bearing deflexed slender prickles, mixed with a few acicles, stalked glands and hairs. Stipules short, linear-lanceolate, fringed with hair and stalked glands. Panicle elongate, racemose or subracemose above, with more or less ascending peduncles in the ultraaxillary part, and long ascending racemose branches below. Leaves ternate or single, much like those of the stem but more coarsely serrate. Rachis and peduncles slender, felted, with short hairs, crowded stalked glands mostly no longer than the hairs, and very slender aciculate prickles and unequal acicles, which are nearly patent above, but lower down become strongly declining as well as stouter, and occasionally even deflexed. Sepals reflexed in flower and fruit, ovate, shortly pointed, green externally, bearing a few acicles and plentiful stalked glands, conspicuously grey-felted internally. Petals white or pinkish, narrow, small. Stamens white, at length red-based, longer than the greenish white styles.

Habitat.-Woods; not observed in hedges or in the open country, Localities.—Woods near Dinmore station ; Haugh Wood, Mordiford; Wareham Wood, near Hereford. These stations all lie in Herefordshire, and within a radius of ten miles. Wood border at Llowes, Radnorshire. This station lies some eighteen miles to the west of the Herefordshire stations. In foliage and inflorescence bearing some resemblance to R. mucronatus Blox., but distinct and pecul ar in the armature of its stem, in which it comes nearest to R. scabrosus Müll. I have not noticed this armature to be subject to any variation. Queried by Dr. Focke in 1885 (in lit.), natus Blox., I think ”; but upon insufficient and too advanced specimens. Upon a series of specimens submitted to him in the autumn 1892, he notes, “A remarkable form, unknown to me."

Other opinions upon our plant can be seen at the places referred to above; but after watching it in the growing state for seven or eight seasons, I can say with some confidence that it cannot without violence be brought under any of the plants whose names have been as yet suggested for it.

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