JAMESONIA. 



347 



J. imbricata — im-bric-a'-ta (overlapping), Hooker and Greville. 



A greenhouse plant, native of the Andes, from New Grranada southward 

 to Peru. Its fronds, produced from a creeping, black, tortuose rhizome 

 (twisting prostrate stem) of a woody nature, and borne on wiry, slender, 

 blackish stalks 3in. to 4in. long, are 6in. to 18in. long and simply pinnate 

 (only once divided to the midrib). Their pinnse (leaflets), closely set and 

 roundish, often spread horizontally and have their edge conspicuously 

 incurved ; they are of a leathery texture, and their rachis (stalk of the leafy 

 portion) and under-surface are slightly hairy. — Hooker and Greville, Icones 

 Filicum, t. 178. 



Among the several varieties of /. imbricata the following are the most 

 distinct : 



J. i. canescens — can-es'-cens (hoary), Kunze. 



A plant of stouter habit than the species, the long, silky, yellowish-brown 

 hairs of the upper part of the frond being often so dense that they quite 

 hide the leaflets, which are of a hoary (greyish) colour. — Hooker, Synopsis 

 Filicum, p. 369. 



J. i. Pearcei — Pear'-ce-i (Pearce's), Baker. 



A native of the Andes of Ecuador, where it is found growing at an 

 elevation of 10,000ft. Its fronds, a little more than lin, broad, have their 

 pinnse Jin. broad, oblong, and densely hairy beneath, and their edges revolute. 

 — Hooker, Synopsis Filicum, p. 514. 



J. i. verticalis — ver-tic-a'-lis (perpendicular), Kunze. 



A variety with fronds 6in. to 9in. long and Jin. broad, borne on rigid 

 stalks about Ift. long and of a wiry nature ; their oblong-triangular leaflets 

 are naked, and the tomentum (woolly substance) which covers their rachis is 

 very short. — Hooker, Species Filicum, v., p. 105. 



