PENTANDRIA DIQYNIA 339 



ose; flowers axillary, solitary; fructiferous calyx with a scanoua 

 margin. 



HAB. Sea-coast. Aug. ; stem much branched, pubescent ; calyx 

 spreading ; leaves subulate. 



134. ULMUS. Elm. 



U. americana; branches smooth; leaves somewhat doubly serrate, 

 unequal at the base ; serratures uncinately acuminate ; flowers pedi- 

 cellate ; fruit fimbriate. 



HAB. Woods. April. A large tree; branches long, recurved; 

 leaves alternate ; flowers purplish, small, appearing before the leaves. 



U. fulva : leaves oval-oblong, much acuminate, pubescent on both 

 sides ; buds tomentose ; flowers sessile. 



HAB. Rocky hills. April. Tree 2025 feet high; flower con- 

 glom., ciliate ; stamens 7. 



135. SANICULA. Sanicle. 



S. marilandica : leaves all digitate; leaflets oblong, incisely serrate; 



staminiferous flowers numerous, pedicellate. 

 HAB. Woods and thickets. June Aug. 1].; stem 2 feet high; 



Jlower s in small capit. ; umb. white. 

 b. canadensis : leaves subternate ; leaflets ovate, coarsely toothed. 



136. HYDROCOTYLE. Marsh penny-wort. 



H. vulgaris : leaves peltate, orbicular, crenate ; umbels capitate, abou 



5-flowered. 

 HAB. Wet places. 7J.. Root creeping; flowers in interrupted 



spikes ; flower whitish. 

 H. americana: smooth; root tuberous; leaves reniform, somewhat 



7-lobed, crenate ; umbels few-flowered, sessile. 

 HAB. Wet shady places. June Aug. 1J. ; creeping ; stemflliform , 



umbel very small, glomerate. 



137. SISON. Honey-wort. 



S. aureus: stem nearly simple, sulcate; leaves biternate, shining, 



leaflets oblong-lanceolate, attenuate at the base, incisely serrate ; in- 



volucrum 0. 

 HAB. Rocky hills. June July, 7|.; stem l 2 feet fyigh ; umbel 



comp. ; flower yellow ; fruit dark colored. 

 S. integerrimus : stem nearly simple ; leaves bi-tri-ternate, glaucous, 



very entire ; leaflets oval, entire ; umbel with elongated rays ; invo- 



lucrum 0. 

 HAB. Meadows and mountains. June, 7J. ; stem 18 inches high ; 



rays of the umbel filiform ; flower yellow ; fruit black. 

 S. capillaceus: leaves decompound, filiform; stem dichotomous, art- 



gular ; involucrum subpinnatifid. 

 HAB. Brackish meadows. July October, <v) ; much branched, * 



foot long : umbel axillary, pedunc. ; Jlower white. 



