38 THE VOYAGE OF II.M.S. CHALLENGER. 



We have seen no specimen of any species of the genus Sporobolus from the island ; but 

 this must be very near if not the same, as the widely spread Sporobolus virginicus, a species 

 likely to occur in such a situation. 



Polypogon adscensionis, Trinius. 



Pohjpogon adscensionis, Trinius, Agrostidea, ii. p. 11 ; Stendel, Gram., p. 183. 



Ascension. — Indigenous ? 



Collected by Ecklon, and probably an introduced form. 



Polypogon strictus, Nees. 



Polypogon strictus, Nees in Linnsea, vii. p. 297; Kunth, Enum., i. p. 234. 

 Polypogon tenue, Brongn. in Duperr. Voy. " Coquille," Bot. Phaner., p. 22. 



Ascension. — Indigenous 1 

 Cape of Good Hope. 



CRYPTOGAM^.— VASCULARES. 



LYCOPODIACE^E. 

 Psilotum triquetrum, Swartz. 



Psilotnm triquetrum, Swartz in Schrad. Journ. 1800, ii. p. 109, et Synop. Fil., p. 187; Spring., 



Monogr. Lycop., partie 2, p. 269 ; Kuhn, Fil. Afr., p. 187 ; Hook., FiL Exot., t. 63. 

 Bernhardia dichotoma, Willd. ; A. Rich., Voy. "Astrolabe," Bot., p. lii. 



Ascension. — Indigenous. On the Green Mountain— Hooker ; without locality — Blake, 

 1875; Moseley ; Lesson. 



Almost universally spread in warm countries, though it is not found in St Helena nor 

 any of the other islands treated of in this work, except the Bermudas. 



Lycopodium cernuum, Linn. 



Lycopodium cernuum, Linn., Sp. PL, ed. 1, p. 1103; Bory in Duperr. Voy. "Coquille," Bot. Crypt., 

 p. 216; Swartz, Synop. Fil., p. 178; Spring., Monogr. Lycopod., partie 1, p. 79, partie 2, p. 37; 

 Kuhn, Fil. Afr., p. 183. 

 Lycopodium boryanum, A. Rich., Sertum Astrolab. Bot., p. lii. 



Ascension. — Indigenous. Sometimes densely matted with ferns, creeping and ascend- 

 ing the weather side of the Green Mountain, near the summit — Hooker ; without locality — 

 Moseley. Lesson also collected it. 



Common and generally diffused in the tropics, and extending southward to St Paul's 

 [sland and New Zealand. 



Lycopodium saururus, Lam. 



Lycopodium saururus, Lam., EncycL Bot, iii. p. 653; Swartz, Synop. Fil., p. 176; Baker MSS. in 



Herb. Kew. 

 Lycopodium insidare, Caimich. in Trans. Linn. Soc. Lond., xii. p. 509. 



Ascension.— Indigenous. Moseley. 



