352 ASCLEPIADACEJ5. (MILKWEED FAMILY.) 



2. A. Sullivaiitii, Engelm. Mss. Very smooth throughout, tall; leaves 

 ovate-oblong from a heart-shaped sessile base, erect; hoods of the crown olovate, entire, 

 obtusely 2-eared at the base on the outside, with a slender but obtuse claw-liko 

 horn ; pods ovate-lanceolate, with small and scattered warty spines ddefly on the beak. 

 Near Columbus, Ohio, Sullivant. W. Illinois, Engelmann. July. Kesem- 

 bles No. 1 in appearance, in the petals, &c. ; the hoods larger, and exceeding 

 the anthers by one half. 



* # Pods not warty-roughened or prickly. 



-*- Leaves all or chiejly opposite, or tJie middle ones sometimes in fours. 

 *-* Stems simple or nearly so (above usually with 2 lines of minute pubescence). 



3. A. phytolaccoides, Pursh. (POKE-MILKWEED.) Stem (3 -5 

 high) smooth; leaves broadly ovate, or the upper oval-lanceolate and pointed at both 

 ends, short-petioled, smooth or slightly downy underneath (5' -8' long) ; pedicels 

 loose and nodding, numerous, long and slender (l'-3' long), equalling the pedun- 

 cle, many times longer than the ovate-ol>long divisions of tlie (greenish) corolla ; hoods 

 of the crown (white) truncate, the margins 2-toothed at the summit, the horn 

 ivith a long projecting awl-shaped point ; pods minutely downy. Moist copses ; 

 common. June. 



4. A. purpurascens, L. (PURPLE MILKWEED.) Stem rather slen- 

 der (2 -3 high) ; leaves elliptical or ovate-oblong, the lower mucronate, the upper 

 taper-pointed, minutely velvety-downy underneath, smooth above, contracted at the 

 base into a short petiole ; pedicels shorter than the mostly terminal peduncle, about 

 twice the length of the dark purple lanceolate-ovate divisions of the corolla ; hoods of 

 the crown oblong, abruptly narrowed above ; the horn broadly scythe-shaped, with 

 a narrow and abruptly inftexed horizontal point; pods smooth. (A. amcena, L., 

 Michx.) Border of woods, &c., N. England to Michigan and Kentucky: com- 

 mon westward. July. Flowers as large as in No. 1 : peduncle and pedicels 

 downy along one side. 



5. A. variegata, L. (VARIEGATED MILKWEED.) Nearly smooth 

 (l-2high); leaves ovate, oval, or obovate, somewhat wavy, mucronate, con- 

 tracted into short petioles ; pedicels ( numerous and crowded) and peduncle short, downy ; 

 divisions of the corolla ovate (white) ; hoods of the crown orbicular, entire, the 

 horn semilunar with a horizontal point ; pods slightly downy. (A. nivea, L., 

 in part. A. hybrida, Michx.) Dry woods, S. New York to Wisconsin and 

 southward. July. Remarkable for its very compact umbels of nearly white 

 flowers, often purple in the centre. Leaves 4-5 pairs, the middle ones some- 

 times whorled ; veins often purple. Peduncles 1-3, usually |' long. 



6. A. IV uttal liana, Torr. (excl. char.?) Low (6' -15' high), soft- 

 downy, especially the lower side of the ovate or lance-oblong acute slightly petioled 

 leaves; umbels loosely 10- 18-Jlowered, either sessile or peduncled ; pedicels slen- 

 der ('-!' long) ; hoods of the crown oblong, obtuse, yellowish, with a small 

 horn, about the length of the oval greenish-white divisions of the corolla (which 

 are tinged with purple outside). (A. lanuginosa, Nutt.) Prairies and Oak- 

 openings, N. Illinois, Vasey, Wisconsin, Lapham, anr westward. June. 

 Leaves l'-3' long, '-!$' wide, smoothish above, thf upper sometimes scat- 

 tered. Flowers about as large as in the next. 



