June 9, I9< 19 



Jacquemontia Nelsoni sp. nov. 



Perennial: twining, 1 to 3 m. long, densely and softly pu- 

 bescent: leaf blades oblong-ovate to ovate-lanceolate, obtuse or 



rounded at the base, the apex acuminate, 3 to 4 cm. long, mi- 

 nutely but densely rough pubescent above, more softly and more 

 densely pubescent beneath; petioles 6 to 12 mm. long: pedun- 

 cles elongated, 10 to 15 cm. long, cymosely many fl >wered: bracts 

 minute, subulate, 1 to 2 mm. long: pedicels 4 to 10 mm. long: 

 sepals subequal, narrowly ovate, tapering to a subacute or obtuse 

 apex, densely ciliate and pubescent with minute brownish hairs: 

 corolla blue, funnel-form, fully 3 cm. long, pubescent without on 

 the plicae, the limb 2.5 cm. bioad: capsules globose, 6 mm. in 

 diameter, each of the four valves partially divided, 2-celled: seeds 

 sharply angled on two edges, muricately roughened. 



MEXICO: Oaxaca; road between Nopala and Mixistepec, 

 800-4000 feet altitude, E. II '. Nelson 2442, March 5, 1895. Type 

 in the National Herbaiium. 



Jacquemontia confusa Meissn. in Mart. Fl. Bras. 7: 294. pi. 

 106. f. 2. 1869. 



In examining some Mexican specimens of what was sup- 

 posed to be Convolvulus nodiflorus, it was observed that certain 

 specimens possessed subglobose or slightly ovoid and thickened 

 stigmas, instead of the elongated and linear stigmas of typical 

 C. nodifbrus. This difference was at first ascribed to the effects 

 of drying, but a more careful examination showed that in certain 

 specimens the difference was constant. The specimens possess- 

 ing these subglobose stigmas range from Mexico to Brazil, and 

 the shape of the stigma places them in Jacquemontia instead of 

 Convolvulus. Meissner seems also to have noted this plant and 

 described it under the name indicated above. Aside from the 

 difference in the character of the stigma, already noted, there are 

 scarcely any other appreciable characters to separate /. confusa 

 from C. nodifiori4S. 



The north American specimens of J, confusa examined are 

 as follows: Zacuapan, Purpus 2214; Oaxaca, Rose 1 rj6/. 



