90 THE VOYAGE OF H.M.S. CHALLENGER. 



Eragrostis saxatilis, Hems]. (Plate L.) 

 Eragrostis saxatilis, Hemsl., n. sp. 



Species distinctissima facie Festucce species qusedam foliis gracillimis paniculis sub- 

 simplicibus, spiculis laxis'glumis rigidis acumiuatis. 



Perennia fere undique glaberrima, dense csespitosa, rhizoniate crassiuscula. Culmi 

 erecti, filiformes, 9-15 poll, alti, folia sequantes vel breviores. Folia dura, anguste vagi- 

 nantia, arctissime (saltern in siccis) involuta, setacea, margine minute serrulata, apice 

 acutissima, in loco ligulas longiuscule albo-barbata. Paniculce strictse, 4-6 poll, longa?, 

 ramulis ssepius 1-3 spiculatis, inferioribus longioribus (1-2 poll.) plurispiculatis ; spicula? 

 laxa), ssepissime 5-6 florae, 2-4 lineas longse, graciliter breviterque pedicellate, pedicellis 

 aliis spiculis brevioribus vel sequalibus aliis longioribus. Flares disticbi, dissitiusculi, 

 hermaphroditi, vel supremus imperfectus ; glumse duriusculse, longe acuminatse, promi- 

 ii -liter carinatse, 2-exteriores vacuse paulo breviores, anguste lanceolate, 1-nervise, florentes 

 3-nervioe, ovato-lanceolatse ; palea paulo brevior valide 2-carinata, introflexa, apice trun- 

 cata, carinis minute serrulatis ; stamina 3 ; ovarium glabrum ; styli distincti, stigmatibus 

 loiigiuscule phimosis. Caryopsis libera, cylindrica, glabra. 



St Helena. — Endemic. From off Lot — Burchell, 50^ ; among dry rocks, by Major 

 Dentaaffe's, in Sandy Bay — Burchell, 50 ; growing in tufts on the rocky, barren hills near 

 Lot's Wife on the south-west side of the island, at elevations of 1500 to 2000 feet — 

 Mi Hiss. 



A very distinct grass, growing in dense tufts, the rhizome eventually attaining a con- 

 siderable size. The inflorescence and narrow rather hard ehimes remind one of some 



O 



of the forms of Festuca ovina rather than the genus Eragrostis, but the structure is that 

 of the latter genus. Burchell's general indication of the habitat is, " In locis saxosis 

 prseruptis siccissimis." 



Aristida racemosa, Sprengel. 



Arixtifla racemosa, Sprengel, Mantissa Prima, p. 35; Kunth, Enum. PL, i p. 197. 

 Chcetaria racemosa, Roeni. et Schult., Syst. Veg., ii. p. 396. 



" Ex insula St Helense." 



"We have failed to identify this. 



Demazeria oblitera, Hemsl. (Plate LI. figs. 1-8). 



Dcmazcria oblitera, Hemsl., n. sp. 

 Caispitosa, glaberrima, culmisgracilibus adscendentibus, glurna florifera tanturn margine 



ci 



liata. 



Annua? radix fibrosa, fihrillis gracillimis duris 4-5 poll, longis. Culmi 2-9 poll. 

 longi, lseves, demum nitidi, 4-6 nodi, geniculati. Folia fasciculorum radicalium brevissima, 



