Vol. III.] 



MILKWEED FAMILY. 



19 



6. Vincetoxicum Shortii (A. Gray) Britton. Short's Vincetoxicum. 



(Fig. 2936.) 



Gonolobus obliquus var. Shortii A. Gray, Syn. 



Fl. 2: Part 1, 104. 1878. 

 G. Shortii A. Gray, loc. cit. Ed. 2, 404. 1886. 

 V. Shortii Britton, Mem. Torr. Club, 5: 266. 1894. 



Stem pubescent, or hirsute with spreading 

 hairs. Leaves downy, broadly ovate, acute or 

 short-acuminate at the apex, deeply cordate 

 at the base and when old with a narrow or 

 closed sinus, 4 / -7 / long, ij^'-sj^' wide; peti- 

 oles stout, pubescent, i^ / -3 / long; peduncles 

 usually longer than the petioles; cymes sev- 

 eral-flowered; pedicels i / long or more; cor- 

 olla oblong-conic in the bud, dark crimson- 

 purple, its lobes linear, 5 // -7 // long, 5-7 times 

 as long as the hirsute calyx; crown cup- 

 shaped, fleshy, as high as the anthers, its 

 margin about 10-toothed, the alternate teeth 

 thinner and longer, emarginate or 2-parted, 

 the others broader, thicker, with an obscure 

 internal crest or ridge below the summit; fol- 

 licles warty. 



In thickets, Pennsylvania to eastern Kentucky 

 and Georgia. Flowers with the odor of the Straw- 

 berry-shrub. June -Aug. 



7. Vincetoxicum Baldwinianum (Sweet) 



Britton. Baldwin's Vincetoxicum. 



(Fig. 2937.) 



Gonolobus Baldwinianus Sweet; A. Gray, Syn. Fl. 2: 



Part 1, 104. 1876. 

 Vincetoxicum Baldwinianum Britton, Mem. Torr. 



Club, 5: 265. 1894. 



Stem pubescent, or hirsute. Leaves downy, 

 broadly ovate, acute, or short-acuminate at the 

 apex, deeply cordate at the base, 3 / -6 / long, or 

 more; petioles hirsute, \'-2 f long; peduncles 6 // - 

 i2 // long, usually longer than the pedicels; cymes 

 several-many-flowered; corolla white, or cream- 

 color, the lobes thin, oblong, or becoming spatulate, 

 4 // -5 // long; crown thin, the 5 broader lobes quad- 

 rate, emarginate, or obscurely toothed; in their 

 sinuses a pair of very slender linear-subulate teeth 

 of more than double their length, much surpassing 

 the stigma. 



Missouri and Arkansas to Georgia. May-June. 



Family 19. CONVOLVULACEAE Vent. Tabl. 2: 394. 1799. 



Morning-glory Family. 



Herbs, some tropical species shrubs or trees, the stems twining, ascending, 

 trailing or erect, with alternate exstipulate entire dentate lobed or dissected 

 leaves, and regular perfect axillary cymose or solitary flowers. Calyx inferior, 

 5-parted or 5-divided, usually persistent, the segments or sepals imbricated. 

 Corolla gamopetalous, funnelform, salverform, campanulate, tubular or rarely 

 subrotate, the limb 5-angled, 5-lobed or entire. Stamens 5, inserted low down 

 on the tube of the corolla and alternate with its lobes, all anther-bearing, the 

 filaments filiform, or dilated at the base, equal or unequal; anthers 2-celled, the 

 sacs longitudinally dehiscent. Disk annular or none. Ovary superior, sessile, 

 2-3-celled, with 2 ovules in each cavity, or falsely 4-6-celled with a single ovule 

 in each cavity, entire or 2-4-divided; styles 1-3, terminal, or arising from be- 

 tween the ovary- divisions; ovules anatropous. Fruit a 2-4-valved capsule or of 

 2-4 distinct carpels, in our species. Seeds erect, the testa villous, pubescent or 

 glabrcms; embryo plaited or crumpled; cotyledons foliaceous; endosperm fleshy 

 or cartilaginous, usually scanty. 



About 40 genera and 900 species, of wide geographic distribution, most abundant in the tropics # 



