348 GENTIANACE^E. (GENTIAN FAMILY.) 



epatulate, imbricated in the bud ! Stamens inserted at the sinuses of the corolla, 

 short. Style short, persistent : stigma 2-lipped. Pod ovoid, 1-cclled, the celi 

 cruciform: the seeds covering the whole face of the walls. A low and very 

 smooth purplish-green perennial (3'- 8' high), with a simple or sparingly 

 branched stem, opposite wedge-obovate leaves; the dull white or purplish 

 flowers solitary or in clusters of three, terminal and axillary, nearly sessile. 

 (Name from o/3oXos, a small Greek coin ; to which, however, the leaves of this 

 plant bear no manifest resemblance.) 



1. O. Vil'ginica, L. (Gray, Chlor. Bar. -Am., L 3.) llich soil, in 

 woods, from New Jersey to Ohio, Kentucky, and southward : rather rare. 

 April, May. 



8. MENYANTHES, Tonrn. BUCKBEAN. 



Calyx 5-parted. Corolla short funnel-form, 5-parted, deciduous, the whole 

 upper surface white-bearded, valvate in the bud with the margins turned inward. 

 Style slender, persistent: stigma 2-lobed. Pod bursting somewhat irregularly, 

 many-seeded. Seed-coat hard, smooth, and shining. A perennial alternate- 

 leaved herb, with a thickish creeping rootstock, sheathed by the membranous 

 bases of the long petioles, Avhich bear 3 oval or oblong leaflets at the summit; 

 the flowers racemed on the naked scape (1 high), white or slightly reddish. 

 (The ancient Theophrastian name, probably from \ir\v, month, and avQos, a flower, 

 some say from its flowering for about that time. ) 



1. M. trifoliutcl, L. Bogs, New England to Pennsylvania, Wisconsin, 

 and northward. May, June. (Eu.) 



9. LIUINANTHEMUUI, Gmelin. FLOATING HEART 



Calyx 5-parted. Corolla almost wheel-shaped, 5-partcd, the divisions fringed 

 or bearded at the base or margins only, folded inwards in the bud, bearing a 

 glandular appendage near the base. Style short or none : stigma 2-Iobed, per- 

 sistent. Pod few -many-seeded, at length bursting irregularly. Seed-coat 

 hard. Perennial aquatics, with rounded floating leaves on very long petioles, 

 which, in most species, bear near their summit the umbel of (polygamous) 

 flowers, along with a cluster of short and spur-like roots, sometimes shooting 

 forth new leaves from the same place, and so spreading by a sort of proliferous 

 stolons. (Name compounded of \l\wj], a marsh or pool, and {Satfapov, a blossom, 

 from the situations where they grow.) 



1. It. hK'iiaiosiiui, Griseb. (partly). Leaves round-heart-shaped, thick- 

 ish ; lobes of the (white) corolla broadly oval, naked, except the crest-like yel- 

 lowish gland at their base, twice the length of the lanceolate calyx-lobes; style 

 none; seeds smooth and even. (Villarsia lacunosa, Vent. V. cord;\ta, K/l.) 

 Shallow ponds, from Maine and N. New York to Virginia and southward. 

 June -Sept. Leaves 1'- 2' broad, entire, on petioles 4'- 15' long, according 

 to the depth of the water. 



L. TRACHYBPERMUM of the South has roughened seeds, as its name denotes, 

 and is entirely distinct. 



