of the Galapagos Archipelago. 171 



38. Nephrodium molle, Schott. (Aspidium, Sw.) 



Hah. James Island, Charles Darwin, Esq. A species of South America and the West 

 Indies. 



39. PoLYSTicHUM CORIACEUM, Presl. (Aspidiuin, 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. 



Gramine^. 



40. Paspalum penicillatum, Hook. Jil.; glaberrimum, spicis niimerosis in 



paniculam subverticillatam dispositis ad axillas ciliatis, rachi lat^ un- 

 dulata, spiculis solitariis serialibus oblongis glaberrimis nitidis, culmis 

 adscendentibus, foliis ovato- vel elongato-lanceolatis planis. 

 Hab. Charles Island, Charles Darwin, Esq. 



Culmi I2--2 ped. alti, teretes, dichotome ramosi, nodis tumidis nigrescentibus, internodiis 2-3- 

 uncialibus fusco-lineatis politis. Vaginae internodiis aequilongas, laxe vaginantes, glaber- 

 rimae, sulcatae, ad basin usque fissae, juniores ad margines ciliatae, ad orem contractae ; 

 ligula scariosa, lacera, semilunaris. Foliorum lamina 3 unc. longa, latiuscula, acuminata, 

 plana, margine sub lente scabrido-ciliata, undulata, ad basin contracta, subcordata, mem- 

 branacea, subtus glabrescens, striata. Panicula erecta, sub 5 unc. longa. Rami (spicae) 

 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 1 5-30-flora, ultra flores in acumen producta. Spiculae parvae, 

 in costam alternatim flexuosam dispositae, breviter pedicellatae, albidas, glaberrimae, | lin. 

 longae, pedicello articulate cum flore ciliato. Gluma inferior membranacea, concava, vix 

 trinervis, nervis lateralibus valde inconspicuis, marginibus involutis ; superior (seu palea 

 floris inferioris) subsimilis, 3-nervis, nervis obscuris. Palea inferior coriaceo-chartacea, 

 medio tenuissime 1-nervis ; superior enervis, cymbiformis, stamina ovariumque inclu- 

 dens, marginibus incurvis supra medium in lobos 2 oppositos productis. 



Very near the P. fValterianum, Schultz (Kunth, Agrost. p. 41) and to 

 P.Jiuitans, Lam. It differs from those species and all their allies in having 

 smooth leaves and bearded axils to the spikes, also in the smooth spiculae 

 which are placed in a single series, and faint nerves. 



VOL. XX. 2 A 



