378 ORDER 63. UMBELLIFERJE. 



2. CRANT'ZIA, Nutt. (To Prof. Crantz, author of a monograph of 

 the Umbelliferae.) Calyx tube subglobous, margin obsolete ; petals ob- 

 tuse ; fruit subglobous, the commissure excavated, with 2 vittae ; car- 

 pels unequal, 5-ribbed, with a vitta in each interval. Small, creeping 

 herbs, with linear or filiform, entire Ivs. Umbels simple, involucrate. 

 C. liiieata Nutt. Lvs. cuneate-linear, sessile, obtuse at apex, and with trans- 

 verse veins, shorter than the peduncles. 1\. Muddy banks of rivers, Mass, to La. 

 Sts. several inches long, creeping and rooting in the mud. Lvs. 1 to 2' by 1 to 

 2", often linear and appearing like petioles without laminas. Umbels 4 to 8-flow- 

 ered. Fed. longer than the leaves. Involucre 4 to G-leaved. Fr. with red 

 vittse. May Jl. (Hydrocotyle MX.) 



3. SANIC'ULA, Tourn. SANICLE. (Lat. sanarc, to cure; for its 

 reputed virtues as a vulnerary.) Flowers ? $ ; calyx tube echinate, 

 segments acute, leafy ; petals obovate, erect, with a long, inflected 

 point ; fruit subglobous, armed with hooked prickles ; carpels without 

 ribs; vittse numerous. If. Umbel nearly simple. Rays few, with 

 many-flowered, capitate ninbellets. Involucre of few, often cleft leaf- 

 lets, involucel of several entire. 



1 S. Marilandica L. Lvs. 5 to 7-parted, digitate, mostly radical ; Ifts. or seg- 

 ments oblong, incisely serrate ; sterile fls. many, pedicellate, fertile ones sessile ; 

 cal. segm. entire ; sty. slender, conspicuous, recurved. Thickets, U. S. and Can., 

 common. St. 1 to 2f high, dichotomously branched above, smooth, furrowed. 

 Radical Ivs. on petioles G to 12' long, 3-parted to the base, with the lateral segm. 

 deeply 2-parted ; segm. 2 to 4' long. Cauline Ivs. few, nearly sessile. Involucres 

 G-leaved, serrate. Umbels often proliferous. 



2 S. Canadensis L. Lower Ivs. 5-parted, upper 3-parted, segm. ovate, mucro- 

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

 prickles. "Woods, thickets, N. States to 0. and Can., common. About the size 

 of the preceding, or taller. Umbels more numerous and smaller. Lfts. thin, 1 

 to 3' long. Jn. Aug. 



4. ERYN'GIUM, Tourn. (Gr. egvyeiv, to belch ; a supposed remedy 

 for flatulence.) Fls. sessile, collected in dense heads ; cal. lobes some- 

 what leafy ; petals connivent, oblong, emarginate with a long, inflexed 

 point; styles filiform ; fruit scaly or tuberculate, obovate, terete, without 

 vittss or ribs. Herbaceous or suffruticous. Fls. blue or white, bracte- 

 ate ; lower bracts involucrate, the others smaller and paleaceous. 



Scales or chaff of the heads entire Nos. 13 



Scales or chatf of the heads tricuspidntc is'os. 4 7 



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

 remote soft spines ; bracts tipped with spines, those of the involucels entire, shorter 

 than the ovate-globous heads. 2+ Prairies and Pine barrens, W. and S. A re- 

 markable plant appearing like one of the Endogena3. Very glaucous. St. simple. 

 1 to 5f high. Lvs. often 1 to 2f long, % to !' wide. Heads pedunculate, | to 

 1' diam. Fls. white, inconspicuous. JL, Aug. (This name, if allowable as Dr. 

 Gray suggests, is more appropriate than E. aquaticum L. in part.) 



2 E. prostratum Baldw? Sts. filiform, prostrate, rooting at the joints; Ivs. 

 (small) of two forms in the same cluster, some ovate, dentate, petiolate, others 

 Z-deft with lanceolate segments, middle segm. largest ; heads on slender peduncles, 

 axillary, small, ovate; involucre bracts 4 to 6, linear, rather longer than the head; 

 scales entire, shorter than the fls. U In wet places, Ga. and Fla. (Mettauer). 

 St. G to 12' long, many from one root. Lvs. 4 to 7" long. Hds. 3" long, white, 

 the fls. blue. Jn. Oct. (E. gracile Ell.) 



p. FOLiosrnr. Lvs. larger, all 3-cleft, irregularly toothed ; bracts of the invol. 

 leafy, twice longer than the oblong heads. La. (Hale). (E. prostratum 

 Nutt.) 



3 E. Baldwfnii Spreng. Sts. filiform, prostrate, clustered ; lowest Ivs. oblong, 



