BIGNONIACE.E. 241 



II. MENYANTHE*:. Corolla induplicate. 



9. LIMNANTHEMUM. GmeL Limnanthemum. 

 (From the Greek \ipva$, inhabiting a lake, and uvQ^ov, a flower.) 



Calyx 5-parted. Corolla rotate, 5 : parted ; the lobes bearded 

 or scaly at base and furnished with glands. Stamens 5. An- 

 thers erect. Style short or none. Stigma 2-lobed, persistent. 

 Capsule 1 -celled, few-seeded. 



L. lacunosum Griseb:: floating ; leaves reniform-cordate, obscurely cre- 

 nate, smoothish above, spongy beneath ; segments of the calyx ovate-ob- 

 long, one-third as long as the corolla. ( D. C.) Vittarsia lacunosa Pursk. 

 Menyanthes trackysperma Mich. 



Ponds and lakes. Can. to Car. July, Aug. %. Stem long, filiform, rooting 

 in the mud. Leaves about an inch long, on elongated petioles, somewhat fleshy, 

 greenish above and mostly purplish and spongy below. Flowei-s white, fascicu- 

 late, on peduncles produced from the petiole about half an inch below the leaf. 

 Abundant in Sand Lake, N. Y. Floating Heart. 



10. MENYANTHES. Linn. Buckbean. 



(From the Greek ^vn, the moon, (a month,) and avQo;, a flower ; because the 

 plant continues in flower about that time. Eaton.) 



Calyx 5-parted. Corolla funnel-form ; limb spreading, 5- 

 lobed, equal, hairy within. Stamens 5. Style 1, filiform. 

 Stigma 2-lobed, persistent. Capsule 1-celled, with the axis 

 of the valves seminiferous. 



M. trifoliata Linn. 



Marshes. Subarct. Amer. toVirg. W. to the Rocky Mountains. May. %. 

 Plant 8 12 inches high. Root creeping. Leaves ternate, on long petioles 

 which are sheathing at base ; leafets obovate, nearly entire. Peduncles scape- 

 like, longer than the leaves. Flowers pale red, in a terminal raceme. 



Buckbean. Marsh Trefoil. 



ORDER LXXXII. BIGNONIACEJE. BIGNONIADS. 



Calyx divided or entire, sometimes spathaceous. Corolla 

 usually irregular, 4 5-lobed. Stamens 5, unequal, always 1, 

 sometimes 3, sterile ; when 4 are fertile, they are didynamous. 

 Ovary seated in a disk, 2-celled, or spuriously 4-celled. Style 

 1 ; stigma of 2 plates. Capsule 2-celled, sometimes spuriously 

 4-celled, 2-valved. Seeds transverse, compressed, often winged, 

 without albumen. Trees or shrubs, often twining or climbing. 

 Leaves opposite, rarely alternate, without stipules. Flowers 

 somewhat panicled. 



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