ZAPPARIDACEAE, 467 



1. Hesperis matronalis L. DAME'S ROCKET OR DAME'S VIOLET. (I. F. f. 

 1790.) Erect, 6-9 dm. high, pubescent. Lower leaves 1-2 dm. long, tapering 

 into a petiole, ovate or ovate-lanceolate, acute, dentate with minute teeth, pubes- 

 cent on both sides; upper leaves smaller, sessile or short-petioled; flowers 1.5-2.5 

 cm. broad ; blade of the petals spreading ; pods 5-10 cm. long, spreading or 

 ascending, contracted between the seeds when ripe. In fields and along roadsides, 

 Me. to Penn. and Iowa. Native of Europe and Asia. May- Aug. 



39. CONRINGIA Link. 



An erect glabrous annual herb, with elliptic or ovate entire leaves, sessile and 

 cordate at the base, and middle-sized yellowish white flowers in terminal racemes. 

 Sepals and petals narrow, Style 2-lobed or entire. Siliques elongated-linear, 

 angled, the valves firm, 1-3 -nerved. Seeds in I row in each cell, oblong, margin- 

 less; cotyledons incumbent. [In honor of Hermann Conring, 1606-1681, Professor 

 at Helmstadt] 



i. Conringia orientalis (L.) Dumort. HARE'S -EAR. TREACLE MUSTARD. 

 (I. F. f. lygoa.) Stem 3-9 dm. high. Leaves light green, obtuse. 5-13 cm. long; 

 racemes elongating in fruit; pedicels 8-16 mm. long; petals about 1.2 cm. long, 

 nearly twice as long as the sepals ; pods 7-13 cm. long, about 2 mm. wide, 

 4-angled, spreading. In waste places, Mich, and Minn, to the N. W. Terr., and 

 from N. B. to N. Y. and Penn. Naturalized from Europe. 



Family 3. CAPPARIDACEAE Lindl. 



Caper Faintly. 



Herbs or shrubs (rarely trees), with alternate or very rarely opposite 

 leaves, and regular or irregular, mostly perfect flowers. Sepals 4-8. 

 Petals 4 (rarely none). Receptacle elongated or short. Stamens 6-00 f 

 not tetradynamous, inserted on the receptacle ; anthers oblong. Style 

 generally short, ovules oo , on parietal placentae. Fruit a capsule or 

 berry. Seeds mainly reniform in our species ; endosperm none ; embryo 

 generally coiled. About 35 genera and 400 species, mostly of warm 

 regions. 



Pod long-stipitate on its pedicel. 



Pod linear-elongated ; petals generally clawed. 



Petals entire. I. Cleome. 



Petals laciniate. 2. Cristatella. 



Pod short, rhomboid ; petals sessile. 3. Cleomella. 



Pod nearly or quite sessile on its pedicel. 4. Polanisia. 



i. CLEOME L. 



Herbs or low shrubs. Leaves digitately 3-5-foliolate, or simple. Flowers 

 mostly racemose. Calyx 4-divided or of 4 sepals, often persistent. Petals 4, cru- 

 ciate, nearly equal, entire, more or less clawed. Receptacle short, slightly pro- 

 longed above the petal-bases. Stamens 6 (rarely 4), inserted on the receptacle. 

 Ovary stalked, with a gland at its base. Capsule elongated, many-seeded. 

 [Derivation uncertain.] About 75 species, mainly natives of tropical regions, 

 especially American and African. In addition to the following, 4 others occur in 

 the western part of the United States. 



Leaves 3-foliolate ; flowers pink, or white. i. C. serrulata. 

 Leaves, at least the lower, s-y-foliolate. 



Flowers pink, or white. 2. C. spinosa. 



Flowers yellow. 3. C. Intea. 



i. Cleome serrulata Pursh. PINK CLEOME. (I. F. f. 1791.) Erect, gla- 

 brous, 6-9 dm. high. Leaves 3-foliolate, the lower slender-petioled, the upper 

 sessile or nearly so; leaflets lanceolate or oblong, acute, entire or distantly serru- 

 late, 2-8 cm. long; bracts lanceolate or linear; pedicels spreading or recurved, 1-2 

 cm. long in fruit; stipe of the pod about equalling the pedicel; petals oblong, 

 slightly clawed, K>-I2 mm- long, obtuse; pods linear, acute, 2-5 cm, long. 



