304 BOTANICAL GAZETTE [april 



lanceolatis, subglabris. Ligulae circiter 6 aut 7, flavae, nigro- 

 striatae nonnullis lincis, 5-8 mm. longae. Paleae lineares, striatae, 

 marginibus diaphanis. Achaenia linearia, biaristata aristis re- 

 trorsum hamosis, circiter 1 cm. longa. 



Karsten, Bogota, Columbia (type in Herb. Mus. Hist. Nat. Paris). 



This species appears very unique, being distinct in general aspect from 

 any other species known to me. The type sheet, originally in Schxjltz Bi- 

 pontinus' own herbarium, bears several small specimens. These are re- 

 markably uniform and are allied most nearly with Bidcns rubifolia H. B. K., 

 the leaves of which are much less diminutive. The label bearing the specific 

 name here set forth has also the date Dec. 18, 1856, which, from its position on 

 the label, may be that of the determination rather than the collection. While 

 true Bidens rubifolia grows at Bogota (e.g., /. F. Holton 365, Oct. 28, 1852), 

 Karsten and Schultz Bipontinus evidently regarded the Karsten plant 

 specifically distinct. This course I also must adopt, as I am unable to connect 

 the two forms in herbaria by any intermediate forms. 



Bidens odorata Cav. Icon. etDescript. Plant 1 : 9. pi. 13. 1791 ; 

 Coreopsis ferulaefolia Jacq. var. odoratissima Pers. Synops. Plant. 

 2:477. l &°7\ Bidens ferulaefolia DC. var. odoratissima DC. 

 Prodr. 5:603. 1836. — For many years, Persoon's variety odora- 

 tissima of Coreopsis ferulaefolia seems to have been unfamiliar to 

 botanists. DeCandolle (I.e.) merely mentioned it: "quid sit 

 var. odoratissima a Persoonio citata ignoro." Persoon's variety 

 was founded on Cavanilles' plant in Jussieu's herbarium and 

 was said to be native to Peru. This cited specimen I have not 

 found, but there exists in the British Museum a good specimen 

 from Cavanilles, labeled "Coreop[s]is odoratissima nobis, Mexico," 

 which matches Persoon's description precisely. The leaves, 

 probably because of having grown under cultivation, are especially 

 slender-divided and give a superficial resemblance to those of 

 Bidens ferulaefolia (Jacq.) DC. The specimen is identical with 

 two other specimens (in Herb. Brit. Mus.) from the herbarium 

 of Cavanilles, one labeled "Coreopsis odorata olim Bidens," and 

 the other " Bidens odorata Cav. Ic. V. 1, nunc Coreopsis." Both 

 of these last two are further labeled, in pencil, "Cosmos odoratus." 



A study of other mature specimens of Bidens odorata shows 

 that it is a Mexican species primarily (if not indeed exclusively), 

 and is not at all a Coreopsis, but rather a true Bidens, although 



