352 ASCLEPIADACE^E. (MII,K-WI-:i:D FAMILY). 



V 



2. A. fSEllSiViiaitiE, Engelm. MSB. Very smooth throughout, tall; leaves 



ovate-oblong from a heart-shaped nearly sessile I ./;.r , hoods of the crown <// 

 entire, obtusely 1-eared at the base ou the outsiJe, with au incurved ami flat 

 claw-like horn; pods ovate-lanceolate, with small and scattered warty opines 

 chiefly on the beak. Xear Columbus, Ohio, Sullivant. W. Illinois, Enyclmann. 

 July. Resembles No. 1 in appearance, in the petals, &c. ; the hoods larger, 

 anl exceeding the anthers by one half. 



* # Pods not warty -roughened or pritkly. 



*- Leaves all or chiejly opjwsite, or the middle ones sometimes in Jours. 

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



3. A. pliytolaccoides, 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, tony and slender (l'-3' long), equalling the pedun- 

 cle, many times longer than the ovate-oblong divisions of the (greenish) corolla ; hooda 

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

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

 common. June. 



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

 der (2 -3 high) ; leaves elliptical or ovate-oblong, the lower mucronatc, 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 sn/the-shupc-d, with 

 a narrow and abruptly in flexed horizontal point; pods smooth. (A. ainoena, 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 

 (1 -2 high); leaves ovate, oval, or obovate, somewhat wavy, mucronate, con- 

 tracted into short petioles ; pedicels (numerous and croirded) and peduncle short, doirn// ; 

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

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

 in part. A. hybrida, AficLr.) Dry woods, S. New York to Wisconsin anJ 

 southward. July. Remarkable for its very compact umbels of nearly ^hito 

 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. ovalifolisi, Decaisne in DC. Prodr. Low (G'-15' high), soft- 

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

 oled leaves; unibcls loosely l(~)-\?-f?oiccrcd, either sessile or peduncled ; jtedieels 

 ..l-Ji.lei- (V-f long) ; hoods of the crown o!>l ng, obtuse, yellowish, with a small 

 horn, about the length of the oval grceni.Ji white divisions of the corolla (which 

 are tuiged with purple outside). ( A. lanuginosa. Nutt. / A. Vascyi, Care-i}. 

 J'riiiries and Oak-openings. X. Illino's. Vaxcy, Wisconsin, Laphtim, and north- 

 westward. June. Leaves l.V-o' long, S'-l.V' wi !e. snmothish above, the upper 



sometimes scattered. Flowers abjut as large as in the next. 



