Krrn()RHiArK.«. (sruR<;K family.) 4'j5 



red base; involucres about the length of the jie.lunilc, with 5 ovate incised 

 lohc's and a single or few and (ihnnst srssi/r <//(ni(ls ; seeds nearly globular, 

 tubercled. — Slopes and rocky soil, Miuu. to W. 111., Iowa and Mo. 



§ <). TITHYMALUS. Involucres in a terminal dlchotumous or cnmmonli/ mot- 

 Ullijiinii ivjiorcscence, b- or usnatlii A-luhed, with as iiKim/ ftut or convex 

 entire or crescent-shaped fihtnds ; seeds rarunrulate [i-xrept n. If)); uurs as- 

 vending or erect, and mostlj glabrous, without stipules. 



* Perennials with entire leaves, all or onli/ the upper opposite ; involucres long- 



peduncled in a dichotunious injlorescence , mostly ivith 5 transversely ohlong 

 glands ; seeds tvithout caruncle. 



15. E. Ipecacu^nhSB, L. stems many from a very long jjerpendicular 

 root, erect or diffusely sjireading (.'>- 10' long), forking from near the base; 

 leaves varying from obovate or oblong to narrowly linear, almost sessile, 

 glabrous; peduncles elongated (^-V long); pod loug-pedicelled, obtu.sely 

 angled, nearly smcxjth ; seed ovate, white, sparsely marked with impressed 

 dots. — Sandy soil, near the coast; Conn, to Fla. ; also barrens of S. Ind. 



* * Leaves scattered, only the Jioral in the umbelliform injlorescence whorled or 



opposite and of a different shape ; glands mostly 4. 



+- Leaves serrulate or rarely entire ; glands transversely oval, obtuse. 



■w- Seeds smooth and even; pod warty or roiit/h. 



16. E, Darlingtdnii, Gray. Tall /xr^MH/a/ (2-4° high); leaves entire, 

 minutely downy beneath ; those of the stem lanceolate-oblong from a narrow 

 base ; the floral oval, very obtuse ; the upper roundish-dilated with a truncate 

 base ; umbel 5 - 8-rayed, then simply forked ; pod minutely warty ; large glob- 

 ular seed with a small caruncle. — Copses, N. Y. and Tenn., to the mountains 

 of N. C. July -Sept. 



17. E. ObtUSata, Pnrsh. Erect annual (1-2° high); leaves oblong-spat- 

 ulate, minutely serrulate, smooth, all obtuse ; upper ones cordate at base ; Moral 

 ones ovate, dilated, barely mucronate; umbel once or twice divided into 3 rays, 

 then into 2; involucre ivith naked lobes and small stipitate glands; styles dis- 

 tinct, longer than the ovary, erect, 2-cleft to the middle ; pod beset with l«>ng 

 warts. — Damp woods, Va. to S. C, west to Iowa and Kan. May -July. 



E. rr.ATVntvi.LA, L. Erect annual (8-18' high) ; upper stem-leaves lance- 

 olate-oblong, acute, cordate at base, minutely serrulate, mostly with scattered 

 hairs beneath ; floral ones triangular-ovate, sulicordate ; umbel .'■)-ray«'(l ; invo- 

 lucre icith ciliate lobes auiWiw^^e sc^nWo ^hiwU: sti/les longer than the ovary, 

 united at base, slighthf 2-^/^/'/ ,• pod covered with depressed warts. — Along the 

 St. Lawrence and Great Lakes to Mich. June- Aug. (Adv. from Eu.) 



** -fH- Seeds rugose or reticulated ; leaves serrulate; annuals. 



18. E. dictyosperma, Fischer & Meyer. Stem erect (8-18' high); 

 leaves oblong- or olinvatc-spatulate, smooth, all obtuse and obtusely serrate; 

 upper ones cordate at b;ise ; floral ones rounilish-ovate or obscurely heart- 

 shajicd, slightly mucronate ; umbels once or twice 3-forked, then 2-forkeil ; 

 involucre with nearlv naked lobes and small almost sessile glands; styles 

 shorter than the ovarv. spreading or recurved; pod tvarty ; seeds delicately 

 reticulated. — Prairies and roadsiiles, Md. to Minn., Ala., and westward 

 May- July. 



