FLORA OF THE GALAPAGOS ISLANDS. 161 



Chatham IsL. : Andersson ; southwest end, lower region, Bnur, no. 9 

 (bb. Gr.) ; northern part, Baur, no. 7 (bb. Gr.) ; Saodgrass & Heller^ 

 110. 494 (hb. Gr.). Indefatigable Isl. : Conway Bay, Baur^ no. 4 

 (hb. Gr.) ; northern part, Snodgrass & Heller, no. 6G8 (hb. Gr.). Jervis 

 Isl. : Baur, no. 6 (hb. Gr.). Endemic. 



^ Var. insularis. P. obovata, Hook. f. (3), 233; Anderss. (1), 231, & 

 (2), 99, t. 10, f. 2 ; Rob. & Greenm. (I), 146 ; not St. Hil. P. insularis, 

 Bennett, Jour. Bot. xvii. 204 (1879) ; Rob. & Greenm. (1), 14G, in 

 part. — Foliis latioribus, obovato-oblanceolatis vel obovatis, crassioribus ; 

 rioribus minoribus, racemis brevibus. — Galapagos Ids. : Cuming, 

 no. 103, ace. to Bennett, 1. c. ; Mr. Brace (hb. Gr.). Albemarle Isl. : 

 Macrae, ace. to Bennett, 1. c. Charles Isl.: Edmonston ; Andersson; 

 Baur. Chatham Isl.: Darwin; Andersson {hh. Gr.). Jervis Isl.: 

 Baur, no. 8 (hb. Gr.). Endemic. None of the distinctions between 

 this and P. galapageia, given by Bennett, hold in the series of speci- 

 mens now at hand. Andersson names two foliar forms (latifolia and 

 angustifolia). 



EUPHORBIACEAE. 



ACALTPHA, L.^ 



A. Adamsii, nov. sp. ; perenuis ; caule tenui plus minusve repente 

 copiose ramoso fusco griseo-tomentuloso ; iiidumento e pilis brevibus 

 albidis recurvatis sed in apice caulis plus minusve longioribus et flaves- 

 centibus composito; foliis late ovatis vel suborbicularibus crenatis 



1 With tlie material now at hand it is impossible to accept the treatment of 

 Acalyjilia given by Mueller Argovensis, who reduces all Galapageian forms to 

 varieties of one polymorphous species. We have here to do not only with annuals 

 and perennials, with erect and prostrate habit, and with leaves of very different 

 size, covered with pubescence varying from velvety and non-glandular to liirsute 

 or glandular, but accompanying these considerable differences are others in the 

 inflorescence suffluiently striking and constant to be classed as specific distinctions. 

 The following key will suggest the leading diagnostic features. 



Synopsis of the Galapageian Acalyphas. 

 » Involucre of the 9 flowers 3-parted. 



1. A. flACCiDA, Hook. f. 



* * Involucre irregularly 9-toothed : leaves large, 4 to 6 cm. long : floriferous part 

 of the $ inflorescence 5 cm. in length, the peduncles very short. 



2. A. Bauhii, Kob. & Pireenm. 



» * » Involucre irregularly 7-0-toothcd : leaves rarely over 3 cm. in length : 

 floriferous part of (J inflorescence 1 mm. to 2 cm. long, commonly equalled 

 VOL. xxxviii. — 11 



