386 OEDEB 63. UMBELLIFEILE. 



Leaves various, those of the stem generally biternate, of the branches teruatc 

 Leaflets or segments 2 4' long, 1 4" wide, linear or lance-linear, smooth, with 

 slender teeth. Bulblets often numerous, opposite, and within the axils of the 

 bracteate petioles. Umbels terminal. Invol. 0. Umbellets of close, small, white, 

 fls., and slight involucels. Aug. 



26. HELIOSCIAD'IUM, Koch. (Gr. eAof, a marsh, oiuddiov, an um- 

 brella or umbel.) Calyx limb obscurely 5-toothed ; petals ovate, en- 

 tire ; styles short; fruit laterally compressed, oval, not scaly, carpels 

 with 5 filiform ribs, the lateral ribs marginal ; intervals with single vit- 

 tac ; carpophore free, undivided ; seed plano-convex. Lvs. various. In- 

 vol. mostly none. Umbels opposite the Ivs., mostly sessile. Fls. white. 



1 H. nodiflorum Koch. Procumbent, striate; Ivs. pinnate, Ifts. oblong, equally 

 serrate; umbels sessile or on short peduncles; invol. 0, or of 1, 2 or 3 bracts, in- 

 volucel 6 to 8-leaved, reflexed. CD Sts. diffuse, 1 to 2f long, in wet places about 

 Charleston, S. C. Apr. Eur. (Sium L.) 



2 H. leptophyllum DC. Erect or diffusely branched ; Ivs. ternately or somewhat 

 pinnately divided, with linear segm. ; umbellets pedunculate ; invol. and involucels 

 none; fr. roundish. Savannah (Feay. Pond) to La. (Hale). Sts. G' to 2f high. 

 Umbels many, sessile, often one, pedunculate. Fr. smaller than a mustard seed. 

 Jn., JL 



27. CRYPTOT^NIA, DC. HONE-WORT. (Gr. K pv--u, to conceal, 

 ratvia, a wreath or border, from the obselete border of calyx.) Margin 

 of the calyx obsolete ; petals with an inflexcd point ; fruit linear-oblong 

 or ovate-oblong, with slender styles; carpels with 5 obtuse ribs; carpo- 

 phore free, 2 -parted ; vittae very narrow, twice as many as the "ribs. 

 If Lvs. 3-parted, lobed and toothed. Umbels compound, with very 

 unequal rays. Invol. 0. Involucels few-leaved. Fls. white. 



C. Canadensis DC. Lvs. smooth ; Ifts. or segm. rhomboid-ovate, distinct, en- 

 tire or 2 to 3-lobed, doubly serrate, lateral ones oblique at base; umbels numer- 

 ous, irregular, axillary and terminal. Common in moist woods. St. erect, 1 to 

 2f high. Lower petioles 2 to 6' long, clasping. Lfts. 3, 2 to 3' long, 1 to 2' 

 wide, petiolulate. Umbels paniculate, of 3 to 5 very unequal rays. Umbellets 

 of 4 to G unequal pedicels and minute involucels. Fls. small, white. Fr. near 3" 

 long, crowned with the straight styles as long. (Sison, L.) 



28. THITSA, L. FOOL'S PARSLEY. (Gr. <u'0o>, to burn ; on ac- 

 count of its poisonous acridity.) Calyx margin obsolete ; petals obcor- 

 date, with an inflexcd point ; fruit globous-ovate ; carpels with 5 acutely 

 carinated ribs, lateral ones marginal, broader ; intervals acutely angled, 

 with single \ittae, commissure with 2. Poisonous herbs. Invol. 0. 

 Involucels one-sided. Fls. white. 



2E5. cynapium L. Lvs. bi- or tri-pinnately divided, segm. cuneate, obtuse ; invo- 

 lucels S-leaved, pendulous, longer than the partial umbels. In waste grounds, 

 N. Eng., not common. St. about 2f high, green, striate. Lvs. with numerous, 

 narrow, wedge-shaped segm., uniform, dark green, flat. Lfts. of the involucels 

 linear, long, deflected, and situated on the outside. Jl., Aug. The plant some- 

 what resembles parsley, but is distinctly marked by the involucels, and by its dis- 

 agreeable odor. It is said to be poisonous. Eur. 



29. LEPTOCAITLIS, Nutt. (Gr. Xerrrog, slender, Kav^ stem.) 

 Calyx limb obsolete ; petals ovate, entire ; fruit (often scaly) laterally 

 compressed, ovate, crowned with the short styles ; carpels 5-ribbed, lat- 

 eral ribs marginal ; intervals with single vittse, commissure with 2 ; car- 

 pophore 2-cleft at the tip; seed plano-convex. <) Herbs slender, smooth, 



