36 Flora of Denver. 



277. Lithospermum angustifolium MICHX. Branching 

 from the woody root, corolla large, bright yellow, tube long, 

 flowers clustered at the top of the stem, the later plants spread- 

 ing diffusely with inconspicuous flowers. Common, the large 

 flowered blooming in spring, the small flowered in late summer 

 or fall. 



278. Onosmodium Carolinianum DC. Stout and rough, 

 corolla tubular with green lobes, hairy stigma protruding. 

 common along the Platte and on the plains where it is not 

 too dry. Summer. 



CONVOLVULACE^E. (Morning-glory Family.) 



279. Ipomoea leptophylla TORR. (THE MORNING-GLORY 

 BUSH.) This is easily known by its spreading branches from 

 an immense taproot, its linear leaves, and numerous large, 

 crimson, funnel-shaped flowers. Never found far from water, 

 but on the open plains. Summer. 



280. Convolvulus sepium L. (MORNING-GLORY VINE.) 

 Climbing over the shrubs, etc., along the Platte and Clear 

 Creek. The var. repens Gray, is prostrate and white pubescent 

 It grows in fields. Summer. 



281. Convolvulus incanus YAHL. Stems slender, running 

 along the ground or over low herbs, leaves various, usually 

 arrow-shaped, corolla not an inch across, white, tinged with 

 pink. Calyx free from bracts. 



Evolvulus argenteus PURSH. Low, branching from 

 the base, erect, densely covered with soft, long appressed hairs, 

 flowers axillary on short stalks which are deflexed in fruit, 

 corolla rose color or blue. On the plains, rather common. 

 Summer. 



283. Cuscuta decoVa CHOISY. (DODDER.) A parasite with 

 yellow stems and clusters of white, waxy flowers. It appar- 

 ently grows on all kinds of herbaceous plants. Summer. 



