190 PEXTANDKIA D1GTNIA 



144. SIUM. /,. Mutt. Gen. 871. 



[Supposed from the Celtic, She, water; its usual place of growth.] 



Catyx with the limb obsolete, or 5-toothed. Petals obcordate witL 

 an indexed apex. Fruit suborbiculaf, compressed at the sides 'etui 

 diverging, minutely capitate at apex, crowning the fruit by their detyrei 



seel disk-like base. Carpels with 5 equal prominent rather obtuse rib 

 of which the lateral ones are marginal, or sometimes a little dista 

 Channels and Commissure with numerous vittm. Involucre most! 

 many-leaved. Jhvolucels many-leaved. 



I. 8. latifoliujt, L. Stem sulcato-angled ; leaves odd^pinnate* 

 leaflets oblong-lanceolate, acuminate, smooth, equally serrate, sometimes 

 pmnatifid, unequal at base, sessile, the terminal one petiolate • invola 

 ere many-leaved. Beck, Hot. p. 144, 



Bkoai)-li:ayki> Sj cm. Vulgo — Water-Parsnep. 



Root perennial, creeping. Stem 2 to ! or 5 feet high* stoat (half an inch to th re 

 quarters in diameter), angular, with broad channels, striate, smooth, yellowish 

 green, much branched. Leaves pseudo-pinnate, the early o* lower ones somei 

 lachiiate, or multifid, especially when submersed. Leaflets in 3 to 6 pairs withi 

 terminal mU\ »ne, 2 1 1 l inches long, and one fujrth of an inch to an inch wide 



varying from lineaManceolate to ovate-lanceolate, tapering to an acute point acute- 

 ly senate, the terminal one sometimes partially 3 lobed at apex, and an a petioli 



about half an inch long. Utnbele spreading ; rays numerous, unequal, half an inch 



to an inch or inch and a halflong, suicate-angled. Involucre of 6 or 8 leaves, one 



fourth to half an inch long, lanceolate, entire, or often laeiniate-tooihed near the 



apex. Invdurels of 5 to 8 or 10 short lanceolate leaves. Calyx-teeth obsolete 



(elongated, DC. Hook.). Petals white. FVtrfJ roundish oval, conspicuously crown 



ed, whilst young, with the broad thiek yellowish base of the styles Wylopodimi. 



DC). Carpels inclining to separate in the middle : ribs 5, prominent, the lateral 



"nes marginal ; interstices dark brown, striate grooved. 



Hub. Swamps ; margins of streams ; Brandy wine : frequent. Fl. July. IV. Sept. 



Obs. The S. lineare, Mr. Kutt. and Ton: (which according to KuttaU, is a!s# 

 the S.tenui/olium, Muhl.— and theS. longtfolium, Pursh, sedqu J— not ofFbnd* 



<\str.) has been found along the G'irard Canal, on the Xorth-KaMern side of tij 

 ►amy; but is quite rare. Its long narrow lance-linear leaflets, which arc some- 

 times almost filiform, and the serratures rather remote, Live it a strfldngly differ- 

 ent appearance from the preceding. But those features are variable; and uponthe 

 feat examination I could make, I came to the conclusion, with Professors Torre/ 

 and Hooker, that it is only a variety M S. lot, folium. It is doubtful whether an- 

 other species, as the genus is now constituted, occurs in the U. States. 



115. BUPLEURUM. Tournef. DC. ProdrA. p. 127. 

 [Greek, Bous, an Ox, and Pteuran, a rib ; but the application is obscure.] 



Calyx with the limb obsolete. Petals roundish, entire, involute, with 

 a short broadish retusc apex. Fruit ovate-oblong, compressed at the 

 Rides, crowned with the broad depressed base of the styles. Carbds 

 with 5 equal ribs, which are either winged, filiform and acute, or obso- 

 lete; the lateral ribs marginal. Channels with or without vittm. 

 Involucre various, sometimes 0. fnvolucels various. 



