49§ BOTANICAL GAZETTE [juhe 



and these have some achenes 21 mm. long. Bcrlandicr 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. I.e., 

 "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. — Bidcns nodiflora, 

 bruncllac folio Dillen. Elth. 52. pi. 44. Jig. §2. 1732: non Bidcns 

 nodiflora, folio tctrakit, 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 Bidcns. 

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

 figure erroneously, as representing, along with pi. 45. Jig. 55 (Dillen. 

 I.e.), Syncdrclla nodiflora (L.) Gaertn., a species treated by Lin- 

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

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

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

 Jig. 52, but he referred to the Index Kewcnsis 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 Bidcns nodiflora and Syncdrclla nodiflora are 

 retained as distinct species and are not equated. 



Bidens frondosa L. Sp. Plant. 832. 1753. — Bidcns mclanocarpa 

 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 

 Bidcns frondosa by Lemnaeus. 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 



