140 House : New species of Convolvulus 



Convolvulus interior sp. nov. 



Perennial with a horizontal rootstock, prostrate, or the tips 

 rarely showing a tendency to chmb, sparingly branched from the 

 base, 2-8 dm. long ; rather densely and very softly pubescent 

 throughout, except on the upper leaf-surfaces, with shorter and 

 longer woolly hairs, usually cinereous in appearance : leaf-blades 

 deltoid or hastate-ovate, 2.5-4 cm. long, nearly as broad at the 

 shallowly cordate or subtruncate base, glabrate or becoming 

 glabrous above ; the basal auricles inconspicuous, laterally spread- 

 ing, rounded or obtusely angled ; petioles as long as the blades or 

 shorter : peduncles axillary, exceeding the subtending petioles but 

 rarely the blades ; bracts broadly ovate, obtuse, about one-third 

 the length of the corolla, closely investing and surpassing the 



calyx: corolla white, 3.5-4 cm, long, the limb entire, 3-4 cm. 

 broad. 



In sandy soil, Nebraska and Colorado to Oklahoma and Ari- 

 zona. The type collected near Fort Collins, Colorado, by C. S. 

 Crandall, tio. 262^, June 19, 1896, in the herbarium of the New 

 York Botanical Garden. Duplicate type of the same collection 

 in the National Herbarium, sheet no. ^86i2j. The following 

 specimens may also be referred here : 



Fort Collins, Colorado, J. 77. Coiven j6j, June 22, 1893. 

 Riley Co., Kansas, /. B. Norton j^^, 1895. Oklahoma, F. A, 

 Waugh j6i. Indian Territory, on the False Washita, between 

 Fort Cobb and Fort Arbuckle, Dr, Edivard Palmer ^54, 1868. 



This species is perhaps nearest related to the eastern C. repcns 

 by its prostrate habit and pubescence, but differs greatly from it 

 in the shape of its leaf-blades and its shorter corolla. It has also 

 been referred to C americantis (Sims) Greene, which is nearly or 

 quite glabrous and an extensive twiner. 



United States National Museum. 



