APPENDIX VI.

SIR WILLIAM HOOKER'S LIST OF FERNS,

Collected on the Yang-tsze Kiang, in the Province of Sz'chuan,
by LIEUT.-COL. SAREL, 17th Lancers.

GLEICHENIACEÆ.

1. Gleichenia dichotoma, Hook. Sp. Fil. vol. i. p. 12; Schk. Fil.

t. 148.

A species abundant all over India, and found likewise in tropical Africa and America.

DAVALLIACEÆ.

2. Davallia tenuifolia, Sw. Syn. Fil. pp. 133 and 350; Willd. Sp. Pl. 5, p. 477; Hook. Sp. Fl. vol. i. p. 186.

Perhaps the most common of all ferns in China and Japan, scarcely a collection of plants ever arriving which does not contain numerous specimens; yet it is singular that no figure of it has ever been published. Willdenow mistook the Davallia venusta (Schk. Fil. t. 128) for it, but that is a South American species (D. clavata, Sw.), peculiar to the tropical islands of the New World, as D. tenuifolia is peculiar to the tropical continents and islands of the Old World. 3. Davallia Chinensis, Sw. Syn. Fil. p. 138; Hook. Sp. Fil. vol. i. p. 187; Langsdorff and Fisch. Fil. p. 23, t. 27 (excellent); Trichomanes Chinense, Osb. Voy. ed. Angl. 2, p. 357, t. 2, t. 6 (very good).

Our first knowledge of this species was derived from China, where it was detected, and first published, by Osbeck. It appears to be also sparingly found in the Malay Islands. It is always much larger, of a redder colour, and has much broader pinnules and segments than D. tenuifolia, which some, however, think is too closely allied to it.

ADIANTACEÆ.

4. Adiantum caudatum, Linn. Mant. p. 308; Sw. Syn. Fil. p. 122; Schk. Fil. t. 117; Hook. Ex. Fl. t. 104; Sp. Fil. vol. ii. p. 14.

Inhabits all India; but it appears to be rare in China. The same species has, however, been found in Arabia Felix, and in the Cape de Verdes.

5. Adiantum Capillus- Veneris, Linn. Sp. Pl. p. 1558; Sw. Syn. Fil. p. 124; Hook. Brit. Ferns, tab. 41.

This is the well-known "Maiden-hair Fern," found not only in Britain, but in all warm and temperate climates throughout the world.

6. Cheilanthes tenuifolia. Sw. Syn. Fil. p. 129 and 232; Schk. Fil. p. 117, t. 125; Hook. Sp. Fil. vol. ii. p. 82, tab. 87 C.

This is also a very abundant East Indian Fern, extending to the Malay Islands and those of Australia. The specimens of this collection are particularly fine and beautiful, and it is probably very common in the province.

7. Onychium lucidum. Spreng. Syst. Veget. 4, p. 66; Hook, Sp. Fil. vol. ii. p. 122; Hook. Gen. Fil. t. 11; Cheilanthes lucida, Wall. Cat. n. 69; Onychium Japonicum, Kunze, in Schk. Fil. Suppl. p. 11; Onychium Capense, Kaulf. En. Fil. p. 145, t. 1, f. 8 (omitting the locality," Cape of Good Hope"); Trichomanes Japonicum, Thunb. Fl. Jap. p. 340; Caenopteris Japonica, Sw. Syn. Fil. p. 89.

A very delicate species, certainly first found in Japan, and imperfectly described by Thunberg, who referred it to Trichomanes; and Kaulfuss committed a further error by recording it as a native of the Cape of Good Hope. It is assuredly identical with the Onychium lucidum of the East Indies, where it abounds in the mountain regions bordering on the Western Himalaya, and in Khasya.

PTERIDACEÆ.

8. Pellæa geranüfolia, Fée, Gen. Fil. p. 130; Hook. Sp. Fil. vol. ii. p. 132; Pteris geraniifolia, Raddi, Fil. Bras. p. 110; Hook. Ic. Pl. 10, t. 915.

For a long time this well-marked species, with fronds a good deal resembling those of some Cape Geranium, was supposed to be peculiar to the New World, and even there to Brazil; but it has since been found in the Mauritius, at the

Cape, in the East Indies, in the islands of the S. Pacific, &c. ; and it now proves to be an inhabitant of China.

9. Pteris (Eupteris) longifolia, Linn. Sp. Pl. p. 1531; Jacq. Hort. Schonbr. t. 390, 400 (excellent); Hook. Sp. Fil. vol. ii. p. 157.

A Fern which is very general in the tropical and subtropical parts of the Old World, as far north as Spain. It is remarkable that, though our earliest knowledge of this species was from specimens found in the West Indies by Plumier, it is nowhere else found in America, except very sparingly in Mexico and Venezuela.

10. Pteris (Eupteris) serrulata, Linn. fil. Suppl. p. 425 (excluding the synonyms); Sw. Syn. Fil. p. 97; Schk. Fil. t. 91 (excellent); Hook. Sp. Fl. vol. ii. p. 167.

Common as this species undoubtedly is in China and Japan, we have no certain knowledge of its being indigenous to any other country of the globe. Swartz, indeed, gives Ceylon as a locality for it; but this statement has never been confirmed. It has long been cultivated in our Ferneries in Europe, and very successfully.

ASPLENIACE.

11. Asplenium (Euasplenium) elegantulum, Hook. Second Cent. of Ferns, t. 28; Sp. Fil. vol. iii. p. 190; Asplenium lanceolatum? var. elegans, Hook. Florula of Hong-Kong in Kew Gard. Misc. 9, p. 342; Athyrium fontanum, Eaton, in Asa Gray's Bot. of Japan, vol. vi. New Series of Mem. Am. Acad. of Arts and Sc. of Philad., pp. 421 and 436.

A perfectly distinct species, though variable in size, and in the more or less compound pinna. It was first discovered in Chusan, then at Hong-Kong, and since in several of the Japanese and Corean islands (Port Hamilton, Tsus-Sima, &c.), and will very likely be found to have an extensive range throughout China and Japan.

12. Asplenium (Euasplenium) Sareli, Hook.; glabrous, stipes 3-4 inches long, green, compressed, herbaceous, slightly winged above; the base paleaceous, with dull black ovatolanceolate acuminated scales; rachises every where compresso-alate and green; fronds subcoriaceous, 4-5 inches long; broad, ovate, acuminate, tripinnate; pinnæ primary and secondary, decurrently petiolate; pinnules about of an inch long, cuneato-lanceolate, laciniately pinnatifid, with sharp subulate segments or teeth; sori copious on nearly all the

pinnules, generally in opposite pairs parallel with the costule and margin, oblong soon confluent; involucres linear, membranaceous, white.-Asplenium Sarelii, Hook. in Sp. Fil. Suppl. cum Ic. ined.

The place of this species in the extensive genus Asplenium is undoubtedly near A. varians, Hook. and Grev. Ic. Fil. t. 172 (Spec. Fil. 3, p. 192), from which it is readily recognised by its larger size (a span long, including the stipes), broader and more cordate frond, the lowest pair of primary pinnæ being the longest, and an inch and a half broad; by the much narrower pinnules, so narrow, indeed, that the sori occupy the whole space between the costule and the margin, one quite parallel with them, and another very generally opposite: in this respect almost resembling an Onychium. It might be as correctly called a tripinnatifid as a tripinnate frond, for the compressed rachises are everywhere winged. The specific name is given in compliment to its discoverer, Lieut-Colonel Sarel, of the 17th Lancers.

ASPIDIACEÆ.

13. Aspidium (Polystichum ?) varium, Sw. Syn. Fil. p. 51; Hook. Sp. Fil. vol. iv. p. 30, tab. 226; Polypodium varium, Linn. Sp. Pl. p. 1551; Aspidium setosum, Sw. Syn. Fil. p. 56; Langsd. et Fisch. p. 15, t. 17; Polypodium setosum, Thunb. Fil. Jap. p. 337; Lastrea opaca, Hook. Florula of Hong-Kong in Kew Gard. Misc. 9, p. 339; Aspidium opacum, Benth. Fl. Hong-Kong, p. 456.

First gathered in China by the Swedish naturalist Osbeck, a favourite pupil of Linnæus. Since found abundantly there and also in Japan. The specimens in this collection are peculiarly large. 14. Aspidium (Cyrtomium) falcatum, Sw. Syn. Fil. p. 43; Langsd. et Fisch. Ic. Fil. p. 13, t. 15; Benth. Fl. Hong-Kong, p. 454; Hook. Fil. Exot. t. 92; Cyrtomium falcatum, Pr. Teut. Pterid, p. 86; Hook. Florula of Hong-Kong in Kew Gard. Misc. 9, p. 340; Polypodium falcatum, Thunb. Fl. Jap. p. 336, t. 36.

This very fine Fern appears to be peculiar to China and Japan; especially common in the latter country, and in Loo Choo and Bonin. A very nearly allied species, the Aspidium caryotideum, Wall., is common in the mountains of Northern India, on the Neilgherries, and in Caffraria in Southern Africa.

15. Nephrodium (Eunephrodium) molle, Schott. Gen. Fil. cum Ic.; Hook. Sp. Fil. vol. iv. p. 68; Aspidium molle, Sw. Syn. Fil. p. 49; Polypodium molle, Jacq. Ic. Pl. Rar. t. 640.

I have had occasion to allude to this in my 'Species Filicum,' as perhaps the most cosmopolitan of all warm country Ferns. All the specimens here are characterized by their large size, 2-3 feet long including the stipes, loaded with fructifications, and, in that state, of a firm subcoriaceous texture.

16. Nephrodium (Lastrea) decursivo-pinnatum, Hook. Aspidium decursivo-pinnatum, Kze. Bot. Zeit. 6, p. 555; Phegopteris decursivo-pinnata, Fée. Gen. p. 242, t. 20. A. 1. (fragments only); Lastrea decurrens, J. Sm. in Bot. Mag. v. 72: Comp. p. 33.

This again is peculiarly a Chinese and Japanese plant, as far as yet known. These specimens from Western China. are much finer than any we have ever received from the coasts or the islands, and more firm and subcoriaceous in texture.

POLYPODIACEÆ.

17. Polypodium (Phegopteris) tenericaule, Wall. Cat. v. n. 335; Hook. in Florula of Hong-Kong, in Kew Gard. Misc. 9, p. 335; Polypodium trichodes, Reinw. Sm. in Hook. Bot. Journ. 3, p. 394; Lastrea leucolepis, Pr. Epim. p. 39; Aspidium religiosum, Kze. in Linnæa, 20, p. 6; Bot. Zeit. 6, p. 263; Metten. Aspid. p. 72.

Judging from the number of specimens of this Fern in the collection, it would appear to be very common in the province, and many of them, including the stipes, are 3-5 feet long. It abounds also in various parts of the East Indies, in the Malay Islands, and in Japan, as well as in China, and has been long cultivated in our gardens.

18. Polypodium (Dictyopteris) membranaceum, Hook.; caudex moderately creeping; paleaceous at the apex, with black subulate scales; stipites slender, a span long, brown glossy; fronds a span long, deltoid-ovate acuminate, membranaceous, glabrous, bipinnate at the base, pinnate in the middle, pinnatifid at the apex; primary basal pinnæ semiovate, falcate, their inferior pinnæ or pinnules much the longest all of them, and the primary segments, oblong, acuminate, pinnatifid; the lobes also oblong, but obtuse,