257 



©tiginal ^xtitlm. 



SECOND SUPPLEMENT TO THE JAMAICA FEENS 

 KECOEDED IN GEISEBACH'S ' FLOEA OF THE 

 BEITISH WEST INDIES.' 



By Gt. S. Jenman. 



In vol. vi. of the ' Journal of Botany' (new series), page 263, 

 I gave a supplement to the Jamaica Ferns recorded in Grisebach's 

 'Flora of the British West Indies.' Since then I have made two 

 hasty trips collecting — one to the Manchester hills, the other to 

 Blue Mountain Peak, by which, with the discoveries of Mr. Nock, 

 of the Government Cinchona Plantation, the following plants have 

 been added to the list of species and varieties then enumerated 

 and described. 



I am again indebted to Mr. Baker for the important and 

 indispensable service of comparing my collections with the very 

 comprehensive fern herbaria at Kew ; for references to figures, and 

 numerous notes as to his idea of the affinity of several of the more 

 notable j)lants. Though agreemg mainly with Mr. Baker's views 

 regarding the limits of species, my acquaintance with the living 

 plants in their habitats has, in a few instances, led me to depart 

 from his conclusions. With one or two exceptions, the new 

 species accepted by Mr. Baker in this paper have his name 

 attached to them. 



Gleichejiia cUcJiotoma, Willd. 



3.* Cyathea Nockii, Jenman, n. sp. — Caudex less than two 

 inches thick, only a few inches long, procumbent and rooting fi-om 

 the under side, corrugated with the raised and densely- crowded 

 bases of the past stipites ; stipites c^spitose, few or many, erect, the 

 gradually- dwindling pinnse reaching to their very base, unarmed, 

 rusty tomentose beneath, above clothed with lanceolate dark-brown 

 scales ; fronds erecto-spreading, plumelike, lanceolate-acuminate, 

 from 2 to nearly 4 feet long, 6 to 9 inches wide in the middle ; 

 pinnae erecto-spreading, 1 to 2 inches apart, truncate and sessile, 

 with a gland at the base beneath, fully pinnate, 3| to 6 inches 

 long, f to li inch wide, acuminate with the point serrate ; 

 pinnules f to f inch long, 2 lines wide, obliquely acute, sub- 

 mucronate, dentate, or the inferior ones crenato-lobulate and 

 rounded at the base, the lowest pair largest and lobed or pinnatifid ; 

 texture coriaceous ; upper surface dark green, glossy, under 

 glaucescent, both naked ; costules rusty above, ribs beneath 

 clothed with pale deciduous bullate scales; rachis angular, 



* The numbers preceding the new species indicate their position in the 

 sequence followed in the ' Synopsis Filicum.' 



s. N. VOL. 8. [September, 1879.] 2 l 



