FLORA OF THE GALAPAGOS ISLANDS, 157 
Cuartes Isu.: Andersson. CHaTHAM IsL.: Andersson (hb. Gr.). 
Duncan Isu.: A. Agassiz (hb. U. S. Nat. Mus.). Garpner Ist.: 
Snodgrass & Heller, no. 615 (hb. Gr.). Hoop Ist.: Snodgrass & 
Heller, no. 756 (hb. Gr.). Endemic. This species is by its much 
shorter style, etc., clearly distinct from A. maximus, Wight & Arn. 
(Tribulus maximus, L). It is, however, exceedingly close to the plant 
recently characterized from the southwestern United States as Kallstroe- 
mia brachystylis, Vail, Bull. Torr. Club, xxiv. 206 ( Tribulus brachystylis, 
Robinson, Syn. Fl. i. pt. 1, 854). The Galapageian plant, however, 
differs from the continental in slightly more slender habit, smaller and 
more unequal leaflets (usually 2 or 3 rather than 4 pairs), and more 
enduring sepals which persist even at the maturity of the fruit. A. 
brachystylis has been found in Mexico, but apparently not in S. America. 
Trisutvus, L. 
T. cistorpes, L. Sp. 387 (1753); Hook. f. (3), 231; Anderss. (1), 
244, & (2), 107.— Atpemarte Ist.: Macrae. Cuarves Ist.: Snod- 
grass & Heller, no. 400 (hb. Gr.). Hoop Ist.: Snodgrass & Heller, 
no. 743 (hb. Gr.). INDEFATIGABLE Isu.: Andersson (hb. Gr.). JAMES 
Ist.: Darwin. Seymour Ist. : south, Snodgrass & Heller, no. 598 
(hb. Gr.). Further distrib. general in warm and temperate countries. 
Var. anacanthus, nov. var. Formae typicae habitu foliisque similis ; 
floribus plus minusve minoribus ; petalibus 1-1.2 cm. longis; fructus 
carpellis vel tribus vel quatuor vel saepius omnibus ab aculeis omnino 
destitutis. — ALBemarte Isu.: Lee (hb. Gr. & hb. U. S. Nat. Mus.). 
Tagus Cove, March, 1899, common near beach and on sandy hillsides up 
to 200 m. alt., Snodgrass & Heller, nos. 163 (hb. Gr.), 165 (hb. Gr.), 
© 915 (hb. Gr.). Endemic. 
T. SERICEuS, Anderss. (1), 245, & (2), 107; Rob. & Greenm. (1), 
ai f. Servicens, var. humifusus, Rose, (1), 136. — Cuarves Isi.: in 
ower arid region, Andersson (var. humifusus) ; A. Agassiz; Baur, no. 39 
(hb. Gr). Cuarnam Ist. ; in lower arid region, Andersson (var. 
ge (hb. Gr.), Endemic but too near the cosmopolitan 7. terres- 
> . 
: is sp. — CuLperrer Isu. ; Snodgrass & Heller, no. 3 (hb. Gr.). A 
i uenitose species with short internodes and geniculate stem. 
© Specimens are sterile and indeterminate. 
