of the Galapagos Archipelago. 171 
38. NEPHRODIUM MOLLE, Schott. (Aspidium, Sw.) 
Hab. James Island, Charles Darwin, Esg. A species of South America and the West 
Indies. 
39. POLYSTICHUM CORIACEUM, Presl. (Aspidium, Sw.) 
Hab. James Island, Charles Darwin, Esq. Very common in all warm latitudes. 
In Mr. Darwin's collections there is another fern, in a barren state, from 
Chatham Island, with a tripinnate frond; it is probably a species of Poly- 
podium. 
MONOCOTYLEDONES. 
GRAMINEZ. 
40. PASPALUM PENICILLATUM, Hook. fil.; glaberrimum, spicis numerosis in 
paniculam subverticillatam dispositis ad axillas ciliatis, rachi lata un- 
dulatà, spiculis solitariis serialibus oblongis glaberrimis nitidis, culmis 
adscendentibus, foliis ovato- vel elongato-lanceolatis planis. 
Hab. Charles Island, Charles Darwin, Esq. 
Culmi 11-2 ped. alti, teretes, dichotomé ramosi, nodis tumidis nigrescentibus, internodiis 2-3- 
uncialibus fusco-lineatis politis. Vaginæ internodiis zequilongze, laxé vaginantes, glaber- 
rimz, sulcate, ad basin usque fissze, juniores ad margines ciliatæ, ad orem contractze ; 
ligula scariosa, lacera, semilunaris. Foliorum lamina 3 unc. longa, latiuscula, acuminata, 
plana, margine sub lente scabrido-ciliata, undulata, ad basin contracta, subcordata, mem- 
branacea, subtüs glabrescens, striata. Panicula erecta, sub 5 unc. longa. Rami (spicz) 
15-20, erecto-patentes, solitarii binive, ad axillas ciliato-barbati, 1 unc. longi, interdum 
unilaterales. Rachis latiuscula, concava, dorso carinata, 1 lin. lata, sub lente scabrida, 
margine undulata, inferior 15—30-flora, ultra flores in acumen producta. Spicule parvz, 
in costam alternatim flexuosam dispositze, breviter pedicellatz, albidze, glaberrimze, 3 lin. 
longe, pedicello articulato cum flore ciliato. - Gluma inferior membranacea, concava, vix 
trinervis, nervis lateralibus valdé inconspicuis, marginibus involutis ; superior (seu palea 
floris inferioris) subsimilis, 3-nervis, nervis obscuris. Palea inferior coriaceo-chartacea, 
medio tenuissimé l-nervis; superior enervis, cymbiformis, stamina ovariumque inclu- 
dens, marginibus incurvis supra medium in lobos 2 oppositos productis. 
Very near the P. Walterianum, Schultz (Kunth, Agrost. p. 41) and to 
P. fluitans, Lam. It differs from those species and all their allies in having 
smooth leaves and bearded axils to the spikes, also in the smooth spicule 
which are placed in a single series, and faint nerves. 
VOL. XX. 24 
