33*5 PKNTANDRIA DIGYNIA. 



toothed ; peduncles about 3-flowered ; pedicels elongated ; bracts very 

 short ; petals spathulate, undulate ; style hairy, exserted, deeply 

 cleft ; berries smooth. 



124. THESIUM. Bastard toad-flax. 



T. umbellatum : stem erect ; leaves oval-lanceolate ; fascicles of flow- 

 ers terminal, subcorymbed. 



HAB. Rocky hills and woods. July Aug. Ij.; stem I foot high; 

 leaves alternate, entire ; flowers white. 



125. ANYCHIA. 



A. dichotoma : stem erect or spreading, dichotomously branched; 

 leaves lanceolate, smooth, acute ; flowers about as long as the sti- 



HAB. Dry woods and hills. June Aug. <v) ; st em fllif, pub es. above 

 leaves opposite -Jl. solitary, very minute. 



b. capillacea : very smooth ; flowers spreading, longer than the stipules 

 at their base. 



HAB. Pine-barrens. Aug. A span high ; leaves smaller, often ob- 

 tuse. 



DIGYNIA. 

 126. APOCYNUM. Dog's-bane. 



A. androsaemifolium : leaves ovate, smooth on both sides ; cymes 

 lateral and terminal, smooth; tube of the corolla longer than the 

 calyx. 



HAB. Fields and hedges. June July, 2J.; stem 2 3 feet high- 

 branch, spreading flower pink border spreading. 



A. pubescens : stem erect ; leaves ovate, hoary-pubescent beneath ; 

 cymes pubescent ; corolla longer than the calyx ; border erect. 



HAB. Borders of fields. June July, TJ. ; branches few, erect ; 

 petiole short ; flowers few, small, greenish. 



A. cannabinum: leaves lanceolate, acute at each end, smooth on both 

 sides ; cymes paniculate ; calyx as long as the tube of the corolla. 



HAB. Fields and borders of woods. June, 'ZJ. ; branches slender 

 cym. many-fl. cor- small, campan., greenish. 



127. ASCLEPIAS. Silk-weed, 



* Leaves opposite. 



A. syriaca : stem subsimple ; leaves lanceolate-oblong, petiolate, to- 

 mentose beneath; umbels nodding; nectary bidentate; follicles 

 muricate. 



HAB. Sandy fields, &c. July Aug. 1] ; stem 24 feet hiffh 

 umb. 2 3; 15 20^/Z. ;fl. large, pale-purp. 



