BIGNONIACEAE 1239 
single host, while iare are not particularly selective. Different hosts seem to 
influence e variatio in the parasite, a fact that may have led to too much 
fale slic! on of ape cine 
. THALESIA Raf. Pale, often pink herbs, with short, mostly subter- 
ranean stems. Leaves few. Flowers oad on long ee often more 
deeply colored than the foliage.—About 
species, North American. 
1. uniflora (L.) Britton. Plant 5-16 cm 
ini ‘leaves — dida to 'obovate, 5-10 
ong: . long; lobes lance- 
ps about as os as s the tube: co 
cream-colored and purple- um) 14—18 mm. 
; lo 
ovoid, about 10 mm. long llon uni 
florum T ye (B s -RAPE At 
ooT.)—-Rich woods, rious provinces, 
rarely Coastal ‘Plain, Ga. to Tex. Calif., 
B. C., Ont. and Newf.— —Spr. 
4, LEPTAMNIUM Raf. Dark- o me or yellowish-brown herbs, with 
branching stems. Leaves very few. Flowers racemose or pos paler 
than the stem, separated.—One species. 
virgini L.) Raf. Plant 1-4 | 
e mm. ; 
virginiana Bart.|—(BEECH-DROPS. CANCER- 
ROOT.)—Under beech trees, various prov- 
inces, Fla. to La., Mich., and N. B.—Spr. 
Famity 18. BIGNONIACEAE — TRUMPET-CREEPER FAMILY 
bs, trees, woody vines, or rarely herbs. Leaves opposite, or 
e or 
4 didynamous stamens. Anthers with mostly divaricate sacs. Gynoecium 
of 2 united earpels. Ovary 1-celled or 2-celled by the meeting of i 
placentae. Ovules numerous. Fruit a capsule. Seeds wi inged or ap- 
pendaged.—About 60 genera and more than 500 species, mostly NM 
Leaf-blades compound : vines or rarely herbaceous plants: calyx 5-lobed. 
Calyx with an undulate margin: capsule flattened parallel with its partition. 
1. ANISOSTICHUS. 
Calyx with 5 lobes: capsule flattened at right angles with 
its partition. 
