HOUSE, THE GENUS 1P0M(EA 197 



i 30. Ipomoea pubescens Lam. Tabl. Encyc. 1: 265. 1891. — Encyc. 

 6:15. 1804.— Meissn. in Mart. Fl. Bras. 7: 224. 1869. 



Convolvuloides pilosa Moench, Meth. 452. 1794. 



Ipomoea Papiriu & suhtriloha Ruiz. & Pav. Fl. Peruv. 2: 11. 1799. 



Ipomoea varia Roth, Catal. 2: 17. 1800. 



Convolvulus pubescens Willd. Enum. Hort. Berol. 1: 203. 1809. 



Convolvulus Papiria Spreng. Syst. 1: 592. 1825. 



Batatas Papirin & suhtriloha G. Don, Gen. Syst. 4: 261. 1838. 



Pharbitis varia, G. Don, 1. c. 263. 



Phurbitis pubescens Choisy, in DC. Prodr. 9: 344. 1845. 



Stems retrorsely hispid and pubescent with long whitish pili; leaf-blades similar 

 to the preceding but more hispid-pubescent; sepals narrowly ovate, acuminate, 

 15-18 mm. long, 7-8 mm. broad at the rounded or subcordate base, becoming 20 by 

 18 mm. in fruit; corolla 3-4.5 cm. long, the tube white, 7-8 mm. thick above the 

 calyx, the purple 5-angled limb 2.5-5 cm. broad. 



Type locality: America (Lam.); Prov. Tarma, Peru (Ruiz. & Pav.). 



Distribution: Stony hills, western Texas and Mexico to Peru and 

 Bolivia. 



Illustrations: Ruiz. & Pav. 1. c. pi. 120. f. a. 



Specimens examined: Western Texas; C. Wright 509 (G). Mexico: 

 Dr. J. Gregg 389, 1848-49 (G). Queretaro; Pringle 7194, 1896 (G). 

 Rose, Painter & Rose 9541, 1905 (N). Durango; E. W. Nelson 4638, 

 4747 & 4962, 1898 (N). Hidalgo; Purpus 1393, 1905 (N, Y). Rose, 

 Painter & Rose 8354, 1905 (N). Valley of Mexico; Rose, Painter & Rose 

 9541, 1905 (N, Y). 



The above cited specimens are identical with Rusby's 1988, 1885, from 

 near La Paz, Bolivia, which agrees in all particulars with the descriptions of 

 Lamark and of Ruiz & Pavon. 



6. Hederacese. Annuals or perennials, rarely with tuberous roots; 

 stems and foliage usually pubescent or hirsute; peduncles usually several 

 or many flowered; sepals equal or nearly so, broadest at or near the base, 

 usually densely hispid and acute to acuminate or attenuate-caudate ; corolla 

 blue or white ; ovary 3-celled or sometimes 5-celled. 



Sepals acute, 8-15 mm. long. 



Stems prostrate; ovary 5-celled; leaf-blades hastate- 

 cordate or lobed; root tuberous. 31. I. decasperma. 

 Stems twining; ovary 3-celled, leaf-blades ovate. 

 Stems and leaves hirsute to glabrate. 



Leaf-blades usually entire; corolla 4-6 cm. long. 32. 7. purpurea. 



Leaf-blades usually 3-lobed; corolla 2.5-3 cm. long. 33. 7. hirsutula. 

 Stems and leaves densely and softly tomentose. 34. 7. jamaicensis. 



Sepals attenuate or caudate-attenuate. 



