OKDEII 63. UMBELLIFER^E. 135 



fc Fruit ronnd-ovate. v Petals concave, not emarginate. Vittze single AP. CM. 25 



Petals inflected, emarginate. Vittae 00 PIMPINELLA. 17 



I Ribs of the carpels obsolete. Fruit ovate, covered with large vittae EULOPHUS. 26 



I Ribs of each carpel 9. Fruit globular. Outer flowers radiant CORIANDRUM. SO 



I Ribs of each carpel 5. x Fruit round, didymous CICCTA. 27 



x Fruit oval. Leaves pinnate SIUM. 28 



x Fruit ovate. Leaves capillaceous DISCOPLKURA. 29 



1. HYDROCOTYLE, L. PENNYWORT. Calyx limb obsolete. Pet. 

 spreading, the point not inflected. Fr. laterally flattened, the commissure 

 narrow. Carpels o-ribbed, without vittse. ? Low, smooth, creeping. Umb. 

 simple. Invol. few-leaved. Fls. small, white. June Aug. Figs. 334-5. 



* Leaves reniform or cordate, the base lobes not united Nos. 13 



* Leaves peltate, orbicular, the base lobfts united Nos. 4, L 



1 H. Amorica.ua L. St. filiform : Ivs. round-reuiform, slightly lobed, crenate : umb. 



sessile, 3-5-fhvd. ; fr. orbicular, li Damp shades. 2 6'. Plant very smooth and shining. 



2 H. raiiuiiculoides L. /. Lvs. round-reniform. deeply 3-5-cleft, lobes creuate ; 



ped. 12', branched ; umbels 5-9-flwd., capitate. U Waters. Pa., and S. Lvs. veiny, 4-8'. 



3 H. repaiida Pers. Lvs. broad-ovate, cordate, rounded, margin repand-dentate ; 



ped. 2 3', simple ; umb. capitate, 3 or 4-flwd. ; invol. 2-bracted. n Muddy shores, S. 



4 H. umbellata L. Lvs. crenate, with a notch at base, long-stalked (460 ; scapes 



4 6', bearing a simple (rarely proliferous) umb. of 20-30 fls. ii Ponds, bogs. Ms. to La, 



5 H. iuterrupta Muhl. Lvs. crenate ; umb. proliferous, 5-flwd. 2f Wet. Ms. to Ga. 



2. CRANTZIA, Nutt. Calyx margin obsolete. Pet. obtuse. Fr. sub- 

 globous. Carpels unequal, 5-ribbed, with a vitta ^n each interval. ? Small, 

 creeping, with linear or filiform, entire Ivs. Umbels simple, involucrato. 

 C. lIiieAta Nutt. Lvs. cuneate-linear, sessile, obtuse at apex, and with transverse 



veins, shorter than the peduncles. 2f Muddy banks, coastward. Umb. 4-8-flovvered. 



3. SANICULA, Tourn. SANICLE. Fls. 9 $ 3. Cal. segm. acute, 

 leafy. Pet. obovate, erect, with a long, inflected point. Fr. subglobous, 

 armed with hooked prickles. Carpels without ribs. Vittae numerous. 

 U Umbel nearly simple. Rays few, with many-flowered, capitate umbel- 

 lets. Involucre of few, often cleft leaflets, involucel of several entire. 



1 S. 3Iarila.ndica, L. Lvs. 5-7-parted, digitate, mostly radical ; segm. thick, oblong, 



incisely serrate ; sterile fls. many, pedicellate, fertile ones sessile ; cal. segm. entire ; 

 styles slender, conspicuous, recurved. Woods : common. 2 3f. May July. 



2 S. Canadeusis L. Lower Ivs. 5-parted, upper 3-parted ; segm. cuneate-obovate, 



mucronate-serrate ; sterile fls. few, much shorter than the fertile ; sty. shorter than 

 the prickles. Woods, thickets : com. l-3f. Lvs. thin, 1-3'. Umb. few-flwd. Jn.-Aug. 



4. ERYNGIUM, Tourn. Fls. sessile, collected in dense heads. Cal 

 lobes somewhat leafy. Pet. in flexed. Sty. filiform. Fr. scaly or tubercu 

 late, obovate, terete, without vittse or ribs, if (2) Fls. blue or white, brac- 

 teate ; lower bracts involucrate, the others smaller and chaffy. Summer. 



* Scales and chaff of the heads entire, often spinescent Nos. 18 



* Scales and chaff of the heads tricuspidate. a Flowers white Nos. 4, 5 



a Flowers blue Nos. 6, 7 



1 E. yuccaefolium MX. Erect ; Ivs. broadly linear, parallel-veined, ciliate with re- 

 mote, soft spines ; invol. bracts entire, spinescent, shorter than the ovoid-glob, heads, 

 at Prairies nnd pine-barrens, W. and S. 2 5f. Fls. white, inconspicuous. Jl., Aug. 



