APOCYNACE^. (DOGBANE FAMILY.) 



short, few-flowered; the staniiuate sessile aud in a sessile globular scaly gloni- 

 erule. Brandies iiiiuutely warty. 



1. F. Neo-Mexicana, Gray. Siirub G to lO ftet high, glabrous: leaves 

 spatulateoblong, obtuse or obtusely acuminate, shcjrt-petioled, obtusely or 

 obsoletely serrulate, an inch long fertile flowers in sessile fascicles: drune ob- 

 tuse, short-oblong or ovoid. — I'roc. Am Acad. xii. 63. S. Colorado to New 

 Mexico and Texas. 



3. MENODORA, Ilumb. & Bonpl. 



Low shrubby or nearly herbaceous plants, with conspicuous yollow flowers 

 terminating the branches, or becoming lateral. In ours the corolla is nearlv 

 rotate, with a bearded throat. 



1. M. scabra, Gray. Herbaceous from a woody branching base, a span 

 to a foot higli, flax-like, whole herbage or at least the lower j»art pulierulenl- 

 scabrous : leaves linear or the lower oblong, chiefly entire, 4 to 10 lines long : 

 flowers rather numerous : calyx-lobes 7 to 15, slender, linear or subulate : lobes 

 of the bright yellow corolla obovate, much longer than the tube. — Am. Jour, 

 ci. II. xiv. 43. W. Texas to S. Colorado and Arizona. 



Order 48. APOCYNACEJE. (Dogbane Family.) 



Plants with milky or acrid juice, entire (mostly opposite) loaves, reg- 

 ular 5-merons and 5-androus flowers, tlie lobes of the corolla convolute 

 and twisted in the bud, and the filaments distinct and inserted on the 

 corolla. In ours the anther-cells are produced into a sterile appendage 

 at base, counivent around the stigma and adherent to it by a point at 

 the base of the poUiniferous portion; the ovaries are 2 and united <»nly 

 by the common style or stigma, in fruit becoming follicles containing 

 comose seeds. 



1. APOCYNUM, Tourn. Dogbane. Ikdiax Hemp. 



Calyx small, deeply 5-cleft, the tube by means of a thickish disk adnate to 

 the back of the ovaries below. Corolla campanulate, .')-lobed, toward the 

 base bearing 5 small triangular-subulate appendages alternate with the sta- 

 mens. Filaments very short and broad : anthers sagittate. Follicles slender, 

 terete. Seeds numerous, with a long coma at apex. — Pale perennial herbs, 

 with very tough-fibrous bark and opposite mucronate-tij)ped leaves : flowers 

 small, in terminal cymes, white or rose-color: follicles 2 tt) 7 inches long. 



1. A. androsaemifolium, L. One to three feet high, glabrous, or 

 rarely soft-tomentose, branched above; branches widelij spreadiiuj : leaves ovate 

 or roundish, dmtindlij pelioled : cymes loose, spreading: corolla flesh-color, open- 

 campanulate with revolute lobes ; the tube exceeding the ovate acute calyx-lobes. — 

 Across the continent. 



2. A. cannabinum, L- Erect or a.«?ceuding, glabrous or .sometimes 

 soft-pubescent ; branches ascending, leafy to the top : leaves from oval to oblong 



