234 DICOTYLEDONOUS PLANTS. 



HAB. Fields, &.c. Subarc. Amer. to Car. June, July. 2. 

 Stem 3 5 feet high, erect, with spreading branches. Flowers 

 pale red, with the border spreading. Medicinal. Big. Med Bot. 

 ii. 148. Dog's Bane. 



2. A. cannabinum Linn. . leaves on short petioles, lanceolate, acute 

 at each end, smooth on both sides ; cymes paniculate ; calyx as long 

 as the tube of the coroL 



HAB. Fields and woods. Can. to Car. W. to Miss. June. 

 July. 2j..Stem erect, branched. Flmcers small, greenish- 

 white, in terminal cymes. Has the leaves narrower and the 

 flowers smaller than in the preceding. Indian Hemp. 



3. A. hypericifolium Ait. : leaves oblong, smooth, on very short pe- 

 tioles, mucronate, obtuse and subcordate at base ; cymes shorter than 

 the leaves ; calyx nearly as long as the tube of the corol. 



HAB. Gravelly banks of streams. N. S. June, July. it. Stem 

 2 feet high, erect. Flowers small, greenish- white. Plant small- 

 er than the former. 



4. A.pubtsccns Brmcn: leaves on short petioles, ovate-oblong, mu- 

 cronate, hoary-pubescent beneath ; cymes short, pubescent; corol long- 

 er than the calyx. A. cannabinum Mich. Pvrsh. 



HAB. Fields. N. S. June, July. It. Stem 23 feet high. 

 Flowers small, greenish-white. Can be distinguished by the 

 pubescence of its leaves and cymes. 



ORDER LXXVII. ASCLEPIADEJE. Brown. Lind. 



Calyx 5-divided, persistent. Corol hypogynous, monopo- 

 talous, 5-lobed, regular deciduous; activation contorted- 

 imbricate, rarely valvate. Stamens 5, inserted into the 

 base of the corol, and alternate with its segments ; filaments 

 usually connate ; anthers 2-celled, each. cell sometimes divid- 

 ed by incomplete septa ; pollen^ when the anther bursts, coa- 

 lescing into masses which are as numerous as the cells, or 

 sometimes confluent by pairs, and sticking to the 5 processes 

 of the stigma, either by twos, by fours, or singly. Ovaries 

 2 ; ovules indefinite ; styles 2, close to each other, often very 

 short ; stigma 1, common to both styles, dilated, with 5 cor- 

 pusculiferous angles. Placenta attached to the suture, at 

 length separating. Follicles 2, 1 of which is sometimes abor- 

 tive. Seeds indefinite, imbricate, pendulous, usually with a 

 coma at the hilum ; albumen thin ; embryo straight ; radicle 

 superior ; cotyledons foliaceous. 



Plants^ with usually a milky juice, often twining. Leaves 

 entire, usually opposite, with interpetielar cilice, instead of sti- 

 pules. 



