<;kntianack.*:. (<;i:NriAN family.) 353 



2. B. v6rna, Muhl. Stem 1- few-flowered ; flowers .'J - 4" long, larger ; IvUs 

 of the corolla spatulnte, olituse, spreading, thrice the lentjth of the calyx ; anthers 

 ohlonrj ; ovary flat. — Bogs near the coast, S. Va. to Fla. and La. March. 



8. OBOLARIA, L. 



Calyx of 2 .spatulate .spreading .sc])al.s, resieinhling the leaves. Corolla tubu- 

 lar-bell-sliaped, witliering-persi.steut, 4-cleft ; the lohes oval-oblong, or with age 

 spatulate, imbricated in the bud ! Stamen.s inserted at the sinuses of the co- 

 rolla, short. Style short, persistent; stigma 2-lipped. Capsule ovoid, 1-celled, 

 the cell cruciform ; the seeds covering the whole face of the walls. — Alow 

 and very smooth purplish-greeu perennial (.'3-8' high), with a simple or spar- 

 ingly branched stem, o])posite wedge-obovate leaves; the dull white or pur- 

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

 se.ssile; in spring. (Name from 6^o\6s, a small Greek coin, from the thick 

 rounded leaves.) 



1. O. Virginica, L. Herbaceous and rather fleshy, the lower leaves 

 scale-like ; flowers 4" long. — Moist woods, X. J. to 111., south to Ga. and Tex. 



9. MENYANTHES, Tourn. Buckbeax. 



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

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

 ward. Style slender, persistent ; stigma 2-lobed. Capsule bursting somewhat 

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

 alternate-leaved herb, with a thicki.sh creeping rootstock, sheathed by the 

 membranous bases of the long petioles, which bear 3 oval or oblong leaflets ; 

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

 (The ancient Theophrastian name, probably from fi-ffu, month, and dvOos, n 

 flower, some say from its flowering for about that time.) 



1. M. trifoliata, L- — Bogs, N. J. and Teuu. to Ind. and Iowa, and far 

 north and westward. May, .June. (Ku., Asia.) 



10. LIMNANTHEMUM, Gmelin. Floating Hkart. 



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

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

 glandular appendage near the ba.se. Style short or none ; stigma 2-lobed, per- 

 sistent. Capsule few - many-seeded, at length l>ursting irregularly. Seed-coat 

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

 which, in most species, bear near the summit the umbel of (polyganu)us) 

 flowers, along with a cluster of short and s])ur-like roots, sometimes shooting 

 forth new leaves from the same place, and so sprea<ling by a sort of proliferous 

 stolons ; flowering all summer. (Name compounded of \ifiur}, a marsh or pool, 

 and &vdf/xou, a hln.^sfnn, from the situations where they grow.) 



1. L. lacunbsum, Grisebach. Leaves entire, nmnd-heart-shaped (1-2' 

 broad), thickish ; petioles filiform; lobes of the (white) corolla broadly oval, 

 naked, except the crest-like yellowish gland at the base, twice the length of 

 the lanceolate calyx-lobes; style none; seeds smooth and even. — Shallow 

 water, from Maine to Minn., south to Fla. and La. 



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