242 BOTANY or THE VOYAGE OE H.M.S. HEEAID. 
are remarkable in having the axis of deTelopment elongating in a do^vn.ard direction.. V t^s n,ode of 
growth a plant in time may hecomc c.epitose, and lose its arbore.eent character^ It also differs from aU 
Shir species oi AUo,lula in the a.is of vernation being densely covered ^vrth .of artaealatod hans, ana- 
lo'oL to C»otiu. and Balantiu., and also in the stipes being plane ; in true AUo.Ma the vernation >s 
densely sonamose, and the stipes either mnricate or more or less acnleate, then, permanent bases gmng 
^lllcL char eter to the stem of most of the species ; therefore, seeing that th:s spec.es does not . eU 
assodl with AUo.Ml., I am of opinion it shonld be removed from that genus. In a general arrangement, 
Zzet nTme LoJi^osoH. may he adopted, and viewed as forming a connection between Also^JnU and a 
group of Polffodiece, of which Fliegojileris hchwjmha is the type. 
1145. Amphidesmitjm rostratum, Schott, Gen. FH. 0}^s.-Meta^ya rostrala, Presl, 1 c. p. 60. 
-Aspidium rostratum, Tiumh.-AIsopMla rostrata, Mart.-^. blechnoicks, Hook. 1. c. vol. i. p. 3o. 
Bay of Ardita, Darien. 
Islands of Trinidad (Aldridge) and Gorgonu (Barclay), British Guiana (Sd.oml)ursk). 
Gleicheniace^. 
(E. Br., J. Sm. 1. e. vol. ii. p. 115.) 
1146. Mektensia dichotoma, ^\m., Hook. 1. c. vol. i. p. 12. (excl. syn. M. Hookeri, J. S.m.) 
Outskiits of woods, common. 
Tropics generally. 
1147. Mektensia ffluucescens, WiUd., Hook. 1. c. vol. i. p. ll.-M. HooJceri, J. Sm. 1. c. p. 115. 
With the preceding species. 
Trinidad (Aldridge), St. Vincent (Caley), British Guiana (Schombm-gk), Brazil (Miers). 
1145. Mehtensia fnrcata, AYiM., 1. c. p. n.-M. pubescens, ^ yJahra, Hook. 1. c. vol. i. p. 8. 
Southern Darien and Bay of Choco. 
AVest Indies and Tropical America, very general. 
SCHIZJEACE^. 
(Mart., J. Sm. 1. c. p. 119.) * 
1149. LraomrM volubile, Sw., Prcsl, 1. c. p. 103. /3. pinn^ trilobata^.-J. Sm. Sonthem Darien. 
Very general throughout the West Indies and Tropical America. _ , . ^ • 
The present specimens differ from those we have hitherto observed, in the conjugate pmn^ being tri- 
lobed, not pinnate, and having the appearance of an aUy of L.Jleximicm, Sw. 
1150. Lygodium venustum, Sw., Presl, 1. c. p. 105. Common all over the Isthmus. 
Tropical America generally, varying much in the pinn^ being more or less divided and villose. 
1151. ScHiz^A elegans, Sw., Willd. 1. c. p. 88.-Presl, 1. c. p. 77. In p^m woods between 
Cruees and Gorgona. 
Trinidad (Purdie, Aldridge), BrazU and Panama (Barclay). 
1153. AxEMiA dissecta, Presl, Rel. Ha^nk. p. 7-1. t. 11. f. 4. 1. c. p. 88. Savanas about Panama, 
growing under bushes. 
Brazil (Miers), Jamaica (Purdie). 
