SCROPHULARIACEAE (FIGWORT FAMILY) 207 



ORTHOCARPUS (Owl Clover) 



Flowers solitary in the axils, or in a terminal bracted spike; lower lip 

 of the corolla 3-lobed, 1-3-saccate. Stamens 4, 2 shorter; anther cells 

 unlike, the outer attached by its middle, the inner hanging by its end. Cap- 

 sule oblong. — (Gk. orthos — erect, karpos = a fruit.) 



A. Leaves entire or merely 3-lobed or -segmented. 

 B. Corolla white; lower lip purple-spotted, with 3 conspicuous teeth or lobes; 

 leaves 5-8 cm. long. W. O. attenuatus 



BB. Corolla yellow or rose or purple; lower lip entire or with 3 very short teeth. 

 C. Corolla white or yellow; leaves 2.5-5 cm. long. 

 D. Plant pubescent' or hirsute; stem usually simple ; coroUa pubescent outside. 

 E. Calyx teeth acute; corolla yellow, its lower lip about as long as the upper. 

 E. O. luteus 



EE. Calyx teeth sub^ate; corolla white or cream-colored, its lower lip much 

 longer than the upper. E. O. hispidus 



DD, Plant merely puberulent; stem usually with spreading branches above; 

 corolla glabrous. E. O. tolmiei 



CC. Corolla purple or rose-colored. 

 F. Bracts of the inflorescence not colored, all 3-cleft. W. C. E. O. bracteosus 

 FF. Bracts of the inflorescence red or purple, entire or with 2 smaller lateral lobes. 

 G. Leaves 5-8 cm. long, entire or 3-segmented; bracts purple, ciliate at base; calyx 

 8-12 mm. long; corolla 25 mm. long; capsule ovate. U. O. cuspidatus 



GG. Leaves 2.5-5 cm. long, all entire; bracts dull-red, glabrous; calyx 4 mm. 

 long; corolla 8-16 mm. long; capsule obovoid. W. C. O. Imbricatus 



AA. Leaves or some of them more than 3-lobed or -segmented. 

 H. Corolla 4-6 mm. long, purplish. W, O. pusillus (red ant-weed) 



HH. Corolla 10-16 mm. long. 

 I. Corolla purplish; bracts very different from the leaves. 

 J. Tip of upper lip of corolla hooked, puberulent; bracts obtuse. E. 



O. tenuifolius 

 JJ. Tip of upper lip of corolla straight, not hooked, glandular-pubescent; bracts 

 acute. E. O. barbatus 



n. Corolla white or yellowish; bracts not markedly different from the leaves. 

 K. Perennial; lower lip of corolla i-saccate; bracts somewhat whitish or yellow- 

 ish at the tip. C. O. pUosus 

 KX. Annual; lower lip of corolla 3-saccate; bracts not different in color from the 

 leaves. E. O. lacerus 

 HHH. . Corolla 20-28 mm. long. 

 L. Bracts with white or yellow or crimson or purple tips. 

 M. Bracts white or yellow at least at tips; corolla dull-white or purplish tipped, 

 its upper lip glabrous; filaments glabrous. W. O. castilleoldes 

 MM. Bracts crimson or purple at least at tips; corolla crimson or purple, its 

 upper lip bearded on the back; filaments pubescent. W. 



O. purpurascens (purple owl clover) 

 LL. Bracts with tips uncolored. 

 N. Stem much branched; calyx 10-12 mm. long; its teeth lanceolate, about ^ as 

 long as the tube; corolla yellow; anthers i-celled. W. O. erianthera 



NN. Stem simple or with a few branches above; calyx 4 mm. long; its teeth subu- 

 late, about as long as the tube ; corolla cream-colored or pale-rose ; anthers 

 2-ceUed. U. O. llthospermoides 



