144 ASPLENITJM, § EUASPLENIUM. 



common, Dr. T. Thomson. — Here again we have a well-marked species, though 

 it is difficult to say whether it belon<;s rather to the Resectum-^xowp than tliat of 

 Trichomanes, long considered to be peculiar to tropical regions in the New 

 World; more recently detected in tropical Africa and western tropical India. 

 Some of the more simple forms of Aspl. varians, Wall., that is, with simply pin- 

 natifid pinnae, a good deal resemble this, but their more delicate texture, her- 

 baceous stipes, rachis, and fronds, and the equal sides of the pinnae (not dimidiate), 

 will readily distinguish them. It seems to extend no further eastward in India 

 than Ceylon and the Neilgherries. 



104. A. (Euasplenium) viride, Huds. ; caudices short 

 creeping clothed with black subulate scales forming a 

 closely compacted rooting mass, stipites densely crespitose 

 2-4 inches long slender glossy black below then castaneous 

 nearer the fronds stramineous, fronds 3-5 rarely 6 inches 

 long linear-lanceolate membranaceous bright-green (as is the 

 slender rachis) glabrous scarcely acuminated pinnated, pinnte 

 2-3 lines long rather distant pinnate all petiolate rhombeo- 

 ovate obtuse more or less obliquely cuneate at the base 

 deeply but rather irregularly crenate scarcely at all lobed, 

 veins subflabellate, sori 2-4 near the disc remote from 

 the margin oblong oblique at length confluent, involucres 

 very thin membranaceous soon obliterated. — Huds. Fl. Ang. 

 p. 453. Siv. Syn. Fil. p. 80. ll'ilkl. Sp. PL v. ^.332. 

 Schk. Fil. p. 68.' t. 73. Eng. Bot. t. 392. Moore and Lindl. 

 Ferns, Nat. Print, t. 40. Metten. Asplen. p. 139. A. Tri- 

 chomanes, var. ramosum, Linn. Sp. PL p. 1541. A. inter- 

 medium, Pr. DeL Prag. 1. 233. Tent. Pterid. t. 3./. 22. A. 

 umbrosum, VilL 



Hab. Throughout Europe, chiefly in mountain or subalpine regions, from 

 Trondheim, in Norway {Angstrvem), to the S])anish Pyrenees, Bourgeau, n. 455. 

 Himalaya, Glacier of Pindari, Kumaon, elev. 12,000 feet, Strachey and Winter- 

 bottom, n. 5. Kocky Mountains of British North America, Drummond. — One of 

 the most delicate and beautiful of European Ferns, confounded l)y Linnaeus with 

 A. Trichomanes: long supposed to be limited in its localities, now found in 

 widely remote regions, for there are specimens in my herbarium from the Kocky 

 Mountains in British North America; and equally from the lofty regions of 

 Himalaya. Its nearest affinity is assuredly our next species, A. fragile, from the 

 Peruvian Andes. 



105. A. (Euasplenium) /r«^z7^, Pr. ; caudex shortly creep- 

 ing and forming a tufted mass with copious fibrous roots, 

 stipites densely crowded 2-4 inches long slender flexuose 

 lurid-green darker below above often bearing small gemmae 

 and young plants, fronds 3-4 inches to \h foot long 

 thin membranaceous green flexuose pinnated, pinna) sub- 

 petiolate horizontally patent 1-4 lines long subrhomboid 



