CHARACTERS OF TRIBES AND GENERA. - 
separation into at least two distinct groups,—one to con- - 
tain those species in which the stipes are adherent; and 
the other those in which the stipes are articulated with 
the stem, the pinns also being articulated, and having a 
black scutwform (generally oblong) gland at their base on 
the rachis. 
E 
West INDIAN AND AMERICAN. 
Sp. C. arborea, Sm. (v v.) ; var. C. pallida, Hook. Sp. Fil. 
Oss. Great uncertainty has always existed as to which 
West Indian tree Fern should bear the name of Cyathea 
arborea, a species founded by Linnæus on Plumier's figures 
` of a Martinique Fern. The figure represents a tree Fern ` 
with a smooth, cylindrical, tesselated stem, described as ; 
being 10 to 11 feet high and 6 inches thick, and although 
the artist has exaggerated the tessellated character, it is 
evident that it is one of the species having the stipes arti- 
eulated with the stem, indeed I have no doubt that it is the 
prototype of the fine tree Ferns cultivated in Kew Gardens 
under the name of Cyathea elegans Heward, received from ` 
both Martinique and Jamaica, one plant having a stem 10 — 
feet high, as in Plumier's figure. Herbarium specimens of 
this and C. aculeata are very similar, and only specifically 
distinguished by the stipes of the latter being adherent 
and prickly 
CO. serra, Willd. (v v.); Gi insignis, Eat. (v v.) (C. prin- 
x ceps, J. Sm. Ferns Brit. and For.) ; C. Imrayana, Hook. Po 
C. Mexicana, Schlecht.; C. divergens, Kze.; C. Schanschin | 
. Mart.; C. cuspidata, Kze.; C. nigricans, Klot. (v v.); C. 
= aculeata, Willd. (v v.); C- vestita, Mart. ; C. Gardneri, 
Hook. ; C. equestris, Kze.; C. muricata, Willd. (v v.); €. 
hirtula, Mart. ` ris | T 
