192 PENTANDRIA. DIGYNIA. 



perpendicularly serrate, serratures mucronate, lateral leaf- 

 lets oblique at the base. Umbells axillary and terminal. 

 Involucrum of 1 or 2 minute leaves, but mostly wanting". 

 Involucell 5 and sometimes 6-leaved, acuminated. Um- 

 bellets p.umerous, many-flowei ed. Calix acute. Seeds 

 agreeably aromatic, with paler coloured ridges, and a 

 suberose episperm, intervals tuberculate. Hab. Abun- 

 dant around Philadelphia, in the marshes of the Delaware. 



2. bvlhifsra. Leaves various; in bulbiferous stems biter- 

 nate and very thin, in hulbiferous and umbelliferous stems 

 simply ternate, leaflc^ts thicker, upon shorter peduncles, 

 linear siiblanceolate, lacera'.ely serrate; umbell terminal, 

 solitary, lateral bianclilets bulbiferous. Obs. Stem low, 

 smooth, simple or trichotomous. leaves in infertile bul- 

 biferous stems, more compound and slender, with very 

 long petioles, ultimate divisions sublanceolate -linear, with 

 very few serratures, in fertile stems the leaves have very 

 short petioles, petioles of the leaflets more than an inch 

 long. Primary umbell often opposite a leaf, the rest soli- 

 tary, terminal; lateral branchlets short and bulbiferous, 

 bulbs ovate axillary, covered by the dilated sheaths of the 

 leaves, often approximating so as to appear oppositely 

 imbricated, hut where more distant, distinctly alternate, 

 deneral involucrum of the umbell 1 or 2-leaved, partial 

 about 5-'eaved. Hab. On the banks of the Delaware near 

 Philadelphia; but rare. A genuine species, the fruit 

 scarcely distinguishable from that of C. ruiculata. 



Of tl-.is genus there are but 3 species, the 3d. C. virosa, 

 is indigenous to Europe. 



277. MYRRHIS. Mwi^on. (Chervil.) 



<» Fruit sublinear, solid and angular, ridges 

 a little acute, apex attenuated or crowned 

 ^vitli the style. Universal involucrum none." 

 Sprengel. 



Species. 1. JM. canadensis. (Sison canadense. L.) 

 Leaves ternate, leaflets ovate-acute, incisely and doubly 

 serrate, peduncles by pairs; umbells small and unequal. 

 2. bifida. Muhl. Spr. 



A genus of 16 species, according to Sprengel, chiefly 

 indigenous to Europe. 



278. ^ BRASPERMUM.f Mtrrhis. Michaiix. 

 Fruit sublinear, solid, acutely angular, cau- 

 date, and without striae; angles subsulcate, his- 



t So called from the seed being caudate. 



