No. i8j Convolvulus (Convolvulacece.) 127 



(3) Genus Gon6lobus, Moench. 



From two Greek words meaning " angled " and " pod," with reference to the angular 

 fruit of some of the species. 



Fig. 62. — Rough-Fruited Milkweed. G. obl\quus, R. Br. 



Flowers, dull or greenish outside, purplish within, in 

 many-blossomed clusters. Corolla, five-parted, wheel- 

 shape ; in bud, long cone-shape ; its lobes five sixths 

 to one half inch in length and one twelfth of an inch 

 in width ; minutely downy within ; the crown in its 

 throat a fleshy ring. June, July. 



Leaves, three to eight inches in length, round to egg- 

 shape. Base, heart-shape. Apex, abruptly pointed. 



Fruit, rough with hard short points. 



Found, along the banks of streams from the mountains of 

 Pennsylvania and Virginia to Ohio and Missouri. 



A climbing or trailing herbaceous vine three to five feet 

 in length. 



No. 18.— Family CONVOLVULACE^. (Convolvulus 



Fam.) 



Flowers, mostly showy, on axillary flower-stems. Corolla, 

 five-lobed, but with the edge so nearly even that the 

 lobes are scarcely more than indicated, — excepting in 

 Dodder (No. 4), which is more deeply lobed, and 

 sometimes is in fours instead of fives throughout. 

 Calyx, five-lobed or parted, — excepting sometimes in 

 Dodder (No. 4). Stamens, of the same number as the 

 lobes of the corolla, and alternate with them. Styles, 

 one or two. Seed-case, free, two-celled, with two 

 young seeds in each cell ; or four-celled by false par- 

 titions. 



