288 MILKWEED FAMILY. 



• * Flovers pink or light rose-purple ; leaves all opposite; pods naked. 

 A. incarnata, Linn. Wet grounds ; very leafy, branching stems, 

 lanceolate or lance-oblong acute leaves, often slightly heart-shaped at the 

 base ; smooth or smoothish, or in var. piilchra, pubescent and the leaves 

 very short-petioled. 



* * * Flowers dull purplish, greenish, or white. 



•»- Stems branching, almost icoody at base; leaves all opposite; pods 



naked. 



A. perennis, Walt. Nearly smooth ; leaves lanceolate or lance-ovate, 

 slender-petioled ; flowers small, white; seeds mostly without a tuft. 

 S. Ind. and S. 



•*- -t- Stems simple ; leaves all opposite and closely sessile or clasping by a 

 heart-shaped base, the apex rounded or notched; plants smooth, pale or 

 glaucous ; pods naked. 



A. obtu8if6lia, Michx. 2°-3° high, the rather remote, broadly oblong 

 leaves wavy ; umbel mostly solitary, long-peduncled ; flowers pretty 

 large, greenish-purplish. Sandy soils. 



A. amplezicatilis, Michx. Dry barrens N. Car., S. ; stems reclining, 

 l°-2° high, very leafy ; leaves ovate-heart-shaped ; umbels several, short- 

 peduncled ; corolla ash-colored, the hoods white. 



•»- -t- t- Stems simple or nearly so, leafy to the top ; leaves all opposite, 

 ovate, oval, or oblong, pretty large, short-petiAed ; umbels lateral and 

 terminal ; floicers ^' long or nearly so. 



++ Fods beset with soft prickle-shaped or warty projections. 



A. Comiiti, Decaisne. Common Milkweed of fields and low grounds 

 N. ; downy, or the large pale leaves soon smooth above ; flowers dull 

 greenish-purplish. 



*+ *+ Pods even, but usually minutely downy. 



A. phytolaccoides, Pursh. Poke Milkweed. Moist grounds N. and 

 W., S. to Ga. ; smooth or smoothish, 3°-5° high ; leaves large, pointed or 

 acute at both ends ; umbels loose, the long pedicels (l'-3') equaling the 

 peduncle ; corolla greenish, but the more conspicuous hoods white. 



A. purpurdscens, Linn. l°-3° high , leaves downy beneath, smooth 

 above, the upper taper-pointed ; pedicels of the rather loose umbel shorter 

 than the peduncle ; corolla dark dull purple. Dry ground, N. Eng. W. 

 and S. 



A. variegita, Linn. l°-2° high, nearly smooth ; leaves oval or obo- 

 vate, slightly wavy ; peduncle and crowded pedicels short and downy > 

 corolla white, the hoods purplish. Dry woods, N. Y., W. and S. 



^ •(- ^- t- Stems simple or rarely branched, slender; most of the leaves 

 in whorls ; pods slender and naked ; flowers small, white or whitish. 



A. quadrif61ia, Linn. Stems l°-2° high, nearly smooth, naked below, 

 bearing about the middle one or two whorls of 4 ovate or lance-ovate 

 taper-pointed petioled leaves, and beneath or above them usually a pair 

 of smaller ones ; pedicels slender ; corolla mostly tinged with pink, the 

 hoods white. Woods and hills, N. Eng., W. and S. 



A. verticillita, Linn. Dry ground ; l°-2° high, smoothish ; stems 

 very leafy throughout ; leaves very narrow, linear or thread-shaped, in 

 whorls of 3-6 ; flowers greenish-white. 



2. ASCLEPIODORA. (Name made from Asclepias.) 71 



A. vlridis. Gray. Smoothish, 1° high ; leaves alternate, oblong oi 

 lance-oblong ; flowers 1' broad, green, the hoods purplish, in loose ter- 



