158 PROCEEDINGS OF THE AMERICAN ACADEMY. 
RUTACEAE. 
ZANTHOXYLuM, L. 
Z. Prerota, HBK. Nov. Gen. & Sp. vi. 3 (1823); Hook. f. (3), 
231; Anderss. (1), 244, & (2), 106; Rob. & Greenm. (1), 145 
(Xanthoxylon). Z. lentiseifolium, Anderss. ll. cc. Fagara Pterota, L. 
Syst. Nat. ed. 10, 897 (1760); Engl. & Prantl, Nat. Pflanzenf. iii. Ab. 
4,117. F. lentisecfolia, H. & B. ace. to Willd. Enum. Hort. Berol. 
165.— Gatapacos Ips.: Habel. Apineapon Ist,: alt. 525 m., Snod- 
grass & Heller, no. 836 (hb. Gr.). AtBeMaRLeE Isu.: Iguana Cove, 
Snodgrass & Heller, nos. 53 (hb. Gr.), 903 (hb. Gr.); mountain east 
of Tagus Cove, alt. 925 m., Srodgrass & Heller, no. 231 (hb. Gr-). 
Cuarves Isu.: Andersson, identity doubtful ; Lee (hb. U. S. Nat. Mus.). 
Cuatuam Isx.: southwest end, middle region, Baur, no. 40 (hb. Gr-). 
James Ist.: Darwin. — Narsorouenu Ist.: southern part, small tree, 
abundant at 615 m. alt., Snodgrass & Heller, no. 333 (hb. Gr.). 
Further distrib. S. United States, Mex., W. Ind., S. Am. 
SIMARUBACEAE. 
Caste.a, Turp. 
C. gatapaceta, Hook. f. (3), 229, & (4), 262; Rob. & Greenm. (1); 
145. C. galapageja, Anderss. (1), 243, & (2), 106. ©. Galapage, 
Engl. & Prantl, Nat. Pflanzenf. iii. Ab. 4, 219. : 
This species, like Huphorbia viminea and several other Galapage!a" 
plants, shows pronounced formal differences on the different islands, thus: 
Forma typica, inarmata; foliis lineari-lanceolatis acutis. — CHaTHA™ 
Ist.: Darwin; Baur? 
Forma albemarlensis, inarmata vel aculeis parvis gracilibusqn? 
armatis ; foliis oblongis obtusis mucronatis, 1.5-3.4 cm. longis, saepissim® 
dentibus 1-2 parvis lateralibus instructis, supra haud lucidis. — ALB& 
MARLE IsL.; southern part, Baur, no. 45 (hb. Gr.) ; Tagus Cove, Snod- 
grass & Heller, nos. 156 (hb. Gr.), 924 (hb. Gr.), the latter showing the 
hitherto undescribed fruit to be obovoid, 12 mm. long, 9 mm. thick, very 
smooth and shining. : 
Forma bindloensis, inarmata ; foliis integerrimis, anguste obovall 
rotundatis vel mucronulatis, 1-1.6 cm. longis, supra haud lucidis. ~ 
Binptoe Ist.: Baur, no. 43 (hb. Gr.). 
Forma carolensis, spinis brevibus robustioribus armata ; foliis spat” 
latis basi manifeste attenuatis, demum supra valde lucidis 2-2.5 cm. 
