﻿BOTANICAL GAZETTE 



and these have some achenes 21 mm. long. Berlandier 1010 and 

 1 152 both occur in Paris (in Herb. Mus. Hist. Nat. Paris and in 

 Herb. E. Drake). These surpass the London specimens in that 

 they show some of the heads to be radiate in anthesis (cf. DC. lx., 

 "cephalis discoideis ") . The flowering heads are small, about 

 9 mm. high and 4-5 mm. wide, or, including the rays, 1 cm. wide. 

 The rays are small, strongly and definitely dark-roseate, about 

 5 mm. long (including the tube at base), broadly ovate-elliptic, 

 somewhat 3-toothed at apex. The 8 outer bracts average about 

 three-fifths of the length of the inner ones and tend to be indurate- 

 tipped. 



Bidens nodiflora L. Sp. Plant. 832. 1753.— Bidens nodiflora, 

 brunellae folio Dillen. Elth. 52. pi. 44. fig. 52. 1732: non Bidens 

 nodiflora, folio tetrahit, ibid. 53. pi. 45. fig. 53. 



A good specimen preserved in the Linnaean Herbarium matches 

 the first figure of Dillenius very closely and is a true Bidens. 

 Recently, Druce (The Dillen. Herb. 161. 1907) has cited this 

 figure erroneously, as representing, along with pi. 45. fig. 53 (Dillen. 

 lx.), Synedrella nodiflora (L.) Gaertn., a species treated by Lin- 

 naeus (Amoen. Acad. 4:290. 1759) as Verbesina nodiflora, and 

 which is not at all a Bidens. Druce, as is indicated by his use of 

 an asterisk, had not seen a Dillenian specimen matching pi. 44- 

 fig. 52, but he referred to the Index Kewensis as his authority. 

 However, an examination of that work (Ind. Kew. 1:301 and 

 2:1025. 1895), with proper regard for the kinds of type there 

 employed, shows that Bidens nodiflora and Synedrella nodiflora are 

 retained as distinct species and are not equated. 



Bidens frondosa L. Sp. Plant. 832. 1753. — Bidens melanocarpa 

 Wieg. Bull. Torr. Bot. Club 26:405. 1899. 



Greene (Pittonia 4:246. 1901) has given a good survey of pre- 

 Linnaean authors and their treatment of the plant finally named 

 Bidens frondosa by Linnaeus. As additional evidence of the 

 accuracy of Greene's conclusions regarding the characters of true 

 B. frondosa L., there are the three specimens of Linnaeus (two in 

 Herb. Linn, and one in Herb. Hort. Cliff, at Herb. Brit. Mus.) and 

 one of Vaillant (in Herb. Mus. Hist. Nat. Paris). The first one 

 of these has a flowering head with 9 or 10 elongate, foliose, exterior 



