312 BOTANICAL GAZETTE [april 



may even be founded upon two distinct plants from widely 

 separate parts of the world. In fact, the sheet bears a determi- 

 nation by Schultz Bipontinus, naming the plant "ad sinistram 

 Pedis (tenella)" and that "ad dextram Charieis heterophylla 

 Cass." 



Bidens andongensis Hiern, Cat. Welw. Afr. PI. i m : 588. 1898. — 

 At the time of describing this species, Hiern confessed himself 

 uncertain as to its generic status, owing to the insufficient material. 

 Since then, however, an admirable, well developed specimen (John 

 Gossweiler 3631, Angola, August 3, 1907) has been received at the 

 Herbarium of the British Museum. This matches sufficiently in 

 each detail the plant fragment and drawings on the type sheet, at 

 the same herbarium, and proves conclusively that the species is a 

 true Bidens. 



Bidens elata, comb. nov. — Bidens cernua L. var. data Torr. and 

 Gr., Fl. N. Amer. 2:352. 1842; Bidens dentata Wieg., Bull. Torr. 

 Bot. Club 26:412. 1899, non Bidens qiiadriaristata DC. var. den- 

 tata Nutt.; Bidens amplissima E. L. Greene, Pittonia 4: 268. 1901. 

 — An excellent specimen of this species, collected by Scouler at 

 the Straits of De Fuca, is in the Torrey Herbarium, now included 

 in the Herbarium of the N.Y. Bot. Garden. It is identical with the 

 Scouler specimen of Hooker's herbarium (now in Kew Herb.), a 

 specimen referred by Hooker (Hook. Fl. Bor. Amer. 1:314. 1833) 

 to B. chrysanthemoides Michx. (but entirely distinct from Michaux's 

 two type specimens in Herb. Mus. Hist. Nat. Paris). It is iden- 

 tical also with the type and cotype specimens of B. amplissima 

 Greene. However, it is very different from the type (fig. 2) of 

 B. qiiadriaristata DC. var. dentata Nutt. (in Herb. Brit. Mus.), a 

 plant cited synonomously by Torrey and Gray, but probably 

 never seen by them, as indeed their failure to use their customary 

 exclamation marks would partly imply. 



Wiegand, following Torrey and Gray's treatment, likewise 

 equated these two plants, but Greene (/. c), who, however, had 

 not seen Nuttall's type, justly denied their identity. Still 

 Greene's name B. amplissima is superfluous according to rule 

 of nomenclature, and the name elata, supported by a description 

 ("leaves .... unequally and incisely serrate," etc., Torr. and 



