262  Dr.J.D.Hooxzn on the Vegetation of the Galapagos Archipelago. 
— 420. Parkinsonia aculeata, L.—21. Acacia, sp. ?—29. Piptadenia? sp.—23. Mimosa asperata, Las 
24. Turnera ulmifolia, L.—95. Sida rhombifolia, L.—26. Paritium tiliaceum, St. Hil. 
ALTERNANTHERA RADICATA, Hook. fil.; radice valida lignosá apice 3-5-cipiti, foliis stellatis recurvis 
F lanuginosis teretibus carnosis elongato-linearibus integerrimis obtusis medio supernè canalicu- 
latis, ramis floriferis radicalibus abbreviatis lanuginosis apice oligocephalis, capitulis globosis, 
perianthii foliolis oblongis obtusis emarginatis, antheris 2, stigmate bipartito. ; 
Hab. Chatham Island, C. Darwin, Esq. 
Radix pro planta maxima, elongata, lignosa, crassitie pollicis, superne divisa. Folia perplurima, pa- 
tenti-recurva, 13—2 unc. longa, teretia, 1 lin. diametr., basi dense lanuginosa, ceterüm arach- 
noideo-tomentosa. Caules floriferi (seu scapi) foliis breviores, validi, superne bracteati, sim- 
plices v. divisi, plerumque monocephali; bracteis 3—4, capitulo brevioribus, lanuginosis. Capi- 
tula alba, 4 lin. lata, multiflora; floribus compressis lana subscariosá immersis, 11 lin. longis. 
Bracteole floribus pauld longiores, laterales dorso acute, postica concava.  Perianthii foliola 
enervia. Tubus stamineus cyathiformis, brevis; filamentis fertilibus 2, lateralibus, dilatatis, ste- 
rilibus nullis. Ovarium orbiculare, compressum. Stigmata brevia. 
The root of this species is much larger than that of A. subscaposa, with which it agrees in habit. 
The foliage will distinguish it from that, and from every other described species.—July 1847. 
ERRATA. 
Page 194. No. 105 should be Puantaco TOMENTOSA, Lam.? 
— 195. Before No. 114 dele Rustaces. 
— 229. Castera GaLAPAGEIA, Hook. fil. — varietas inermis C. Nicholsonii, Hook. The genus should 
be referred to Simarubee. 
