396 ASCLiiPiADACi:.E. (milkweed family.) 



shorter than the peduncle, 3-4 times the lemjth of the dark purple lanceolnte- 

 oviite dicisions of the coru'/a ; hoods of the crown oblong, ahriiptly narrowed 

 above ; the horn broadlij scylht-shaped, with a narrow and ubrnptly injiuxcd horizontal 

 point. (A. amuena, L., JJichx. ) — Borders of woods, &c., New Enghmd to Illinois 

 and southward. — Flowers G" long. 



5. A. Variegata, L. (VAUiJiG.VTED M.) NeaHi/ r/Uihrous {\° -2° h\<ih); 

 liUL-ia orate, oca/, or odocute, somewhat wavy, contracted into alwit petioles ; pudicds 

 (numirous and crowded) and peduncle short, downij ; divisions of the corolla ovate 

 (while) ; hoods of the crown orbicular, entire, purplish or reddish, the horn 

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

 A. hybrida, Alichx.) — Dry woods, S. New York to Wisconsin and southward. 

 July. — Remarkable for its compact umbels of nearly white tiowers. Leaves 

 4-5 pairs, the middle ones sometimes whorled. 



6. A. ovalifolia, Decaisne in DC. Low (6'- 18' higli), so/t-downij, es- 

 pecially the lower surface of the ovate or lunctolate-oblong acute short-petiokd 

 Itaves; umbels loosehj 10 - \%-jiowered, cither sessile or peduncled ; pedicels slen- 

 der ; hoods of the crown oblong, obtuse, yellowish, with a small horn, about 

 the length of the oval ijreenish-white divisions of the corolla (which arc tinged 

 with purple outside); pods downy. (A. lanuginosa, Ed. 1, probably not of 

 Nutt. A. Vascyi, Careij). — Prairies and oak-openings, N. Illinois, Vascy, Wis- 

 consin, Laphani, and northwestward. June. — Leaves H'-3' long, smoothish 

 above, the upper sometimes scattered ; the middle rarely in threes. Flower 

 4" -5" long. 



7. A. quadrifolia, Jacq. (Four-leaved M.) Nearli/ smooth; stem 

 slender (1° - 2<= high), mostly leafless below, bearing usually o;/e or two whorls 

 of four in the middle and one or two pairs of ovate or ovate-lanceolate taper- 

 pointed petioled leaves (2' -4' long); pedicels slender; divisions of the (pale 

 pink) corolla oblong; hoods of the white crown elliptical-ovate, the incurved 

 horn short and thick; pods linear-lanceolate, smooth. — Dry woods and liills : 

 not very common. June. — Flowers 4" long. 



■*- -<- Sleni branchincj, leafi/ to the top, bearing lateral as well as terminal umbels: 

 leaves jntiolcd : Jlowers small (3" lonij) : pods smooth and glabrous. 



8. A. perennis, Walt. Nearly glabrous; stems (l°-2° high) persistent 

 or somewhat wuodi/ at the beise ; leaves lanceolate or lanceolate-ovate, tapering to both 

 end^, thin, rather slendcr-petioled ; Jlowers white, small; the srarfll hoods of the 

 crown shorter than the needle-shaped horn ; seeds sometimes destitute of a 

 coma! (A. pai-viflora, Pu/s/;, and Ed. 2.) — Low grounds, S. Indiana, Illinois, 

 and southward. 



9. A. incarnata, L. (Swamp JMiLKWEED.) Smooth, or nearly so, in 

 the typical form, the stem with two downy lines above and on the branches of 

 the peduncles (2° -3° high), very leafy; leuas oUong-lanceolnle, acute or pointed, 

 ol>tuseor obscurclg hcart-shajitd at ba.t'. : Jlowers rose-j>ur,)lc; liood.s of the crown 

 scarcely equalling the slender necdle-pointcd horn. — Var. laLciinA has broader 

 and shorter-petiolcd leaves, mure or less hairg-pnbe.scent, as well as the stem. (A. 

 pulchra, Willd.) — Wet grounds; the smooth form very common northward; 

 the hairy variety more so southward. — Milky juice scanty. ^ 



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