NO. isj Cowvol'vulus (Convolvulacecz.) 127 



(3) Genus GONOLOBUS, 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. obftquus, 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. 



