Vol. I] STEWART— BOTANY OF THE GALAPAGOS ISLANDS 155 



James Isl. : James Bay, Snodgrass and Heller. Jervis Isl. : 

 Baur. Narborough Isl. : north side, occasional on lava beds 

 (no. 649). Seymour Isl., south: Snodgrass and Heller. 

 Endemic. 



P. linifolia L. Syst Nat. ed. 10, 1221 (1760); Rob. (1), 

 215. — Chatham Isl.: north side, Andersson. Indefatiga- 

 ble Isl. : northwest side, Andersson. Seymour Isl., south : 

 Snodgrass and Heller. Further distr. Mex., W. Ind., N. S. 

 Am. 



P. subsquarrosa (Hook, f.) Sch. Bip. in Seem. Bot. Herald, 

 309 (1852-1857). Lorentia subsquarrosa Hook. f. (3), 206. 

 P. squarrosa Sch. 1. c; Rob. (1), 215. — Galapagos Ids.: 

 Habel. Chatham Isl. : north side, Darwin. Endemic. 



P. tenuifolia (DC.) Sch. Bip. in Seem. Bot. Herald, 309 

 (1852-1857). Lorentia tenuifolia DC. Prodr. V. 103 (1836). 

 P. tenuifolia Sch. 1. c. ; Rob. (1), 215.— Albemarle Isl.: 

 Black Bight, Snodgrass and Heller; Cowley Bay, common in 

 pumice soil on the lower parts (no. 651); Elizabeth Bay, 

 Snodgrass and Heller; Tagus Cove, common on the tufa hills 

 around the cove (no. 650) ; Villamil, common in lava crevices 

 near the coast (no. 652). Charles Isl.: Andersson; Snod- 

 grass and Heller. Chatham Isl. : Basso Point, occasional 

 in lava crevices (no. 653) ; Wreck Bay, Snodgrass and Heller. 

 Indefatigable Isl.: north side, in lava crevices near the 

 beach (no. 654). Narborough Isl. : (no. 655). Seymour 

 Isl., north : Snodgrass and Heller. Further distr. shores of 

 Peru ? according to Robinson. 1. c. 



Porophyllum Vaill. 



P. ruderale (Jacq.) Cass. Diet. XLIIl. 56 (1826). Kleinia 

 ruder alis Jacq. Enum. 28 (1762). P. ellipticum Cass. 1. c; 

 Rob. (1), 215. — Abingdon Isl. : Snodgrass and Heller. Al- 

 bemarle Isl. : Tagus Cove, abundant in tufaceous soil on the 

 lower parts (no. 656). Charles Isl. : rare among rocks near 

 the shore (no. 658). Chatham Isl.: Basso Point, occa- 

 sional on recent lava (no. 659). Duncan Isl.: Snodgrass 

 and Heller. Hood Isl. : Baur; Snodgrass and Heller. Inde- 

 fatigable Isl. : northwest side, common on the lower parts 



