172 ERYTHEA. 



seuse but uses the generic title Luetkea of Bongard. Focke * retains 

 Eriogynia for E. pectinata Hook, and refers E. caspitosuni Wats, 

 to Spiraea § Petropliytutn, tlie other species, E. uniflora Wats, and 

 E. Hendersoni Canby, being apparently unknown to hira. Con- 

 trary to the statement of Focke, the carpels of E. pectinata Hook, 

 dehisce ou both sutures when fully mature and not on the 

 ventral suture alone, so that Eriogynia can not be upheld by such 

 a distinction. The genus may, however, be maintained in this 

 sense, that is, for the single species E. pectinata Hook and character- 

 ized by having the stamens united at base, the leaves pectinately 

 trifid and the testa loose and much larger than the embryo, in all 

 which particulars it differs from the remaining species of Eriogynia, 

 Watson, which seem indistinguishable from Spirsea except in habit. 



The synonymy of the species above discussed is as follows : 

 Spiraea ccespitosa Nutt.; T. and G. Fl. N. Am. I. 418 (1840). 

 Eriogynia ccespitosa Watson, Bot. Gaz. XV. 242 (1890). Luetkea 

 ccespitosa O. Kuntze. Rev. Gen. Plant, I. 217 (1891). 



Spiraea Hendersoni. Eriogynia Hendersoni Canby, Bot. Gaz. 

 XVI. 236 (1891). Luetkea Hendersoni Greene, Pittonia II. 219 

 (1892). 



Spirasa uniflora. Eriogynia uniflora Watson, Bot. Gaz. XV. 

 241 (1890). Luetkea uniflora O. Kuntze, Rev. Gen. Plant. I. 217 

 (1891). 



Eriogynia pectinata Hooker, Fl. Bor. Am. I. 255 (1833). 

 Saxifrag a pectinata Pursh, Fl. I. 312 (1814). Luetkea sibbaldioides 

 Bongard, Mem. Acad. St. Petersb. Ser. 6; II. 130 (1831?). 

 Spircea pectinata T. and G., Fl. N. A. I. 417 (1840). Luetkea 

 pectinata O. Kuntze, Rev. Gen. Plant. I. 217 (1891). 



Boykinia major intermedia. Whole plant sparsely pubes- 

 cent with rather long reddish hairs, and more or less glandular, 

 especially above; stems rather slender, erect, striate, 4-5 dm. high; 

 radical leaves 5-9 cm. wide, broader than long, abruptly deltoid at 

 the base, which is not at all reniforra, 5 to 7-cleft, the lobes coarsely 

 and somewhat incisely toothed, on stout petioles (with dilated bases) 

 scarcely longer than the blades ; cauliue, three or four, similar, on 

 shorter petioles, which bear a pair of subrotund entire aduate 



*Engler and Prantl, Die. Nat. Pfl, Fam. III. Abt. 3, p. 15. 



