468 FLORA. 



Prairies, 111. to Minn., the Canadian Rocky Mts., Kans., N. Mex. and Ariz. Nat. 

 from the west in its eastern range. July-Sept. 



2. Cleome spinosa L. SPIDER-FLOWER. (I. F. f. 1792.) Erect, 6-12 dm. 

 high, clammy-pubescent. Leaves 5-7-foliolate, the lower long-petioled, 1-2 dm. 

 in diameter, the upper passing into the simple bracts of the raceme; petioles spiny 

 at the base; leaflets lanceolate, acute, serrulate; flowers long-pedicelled, purple or 

 whitish, 2-3 cm. broad; petals obovate, long-clawed; stipe of the linear glabrous 



rat length 5-15 cm. long; stamens often long-exserted. In waste places, S. 

 V. to Fla., 111. and La. Adventive from tropical America. Summer. 



3. Cleome lutea Hook. YELLOW CLEOME. (I. F. f. 1793-) Erect, glabrous, 

 4-10 dm. high. Leaves 5-foliolate, slender-petioled, or the upper 3-foliolate and 

 nearly sessile; leaflets oblong or oblong- lanceolate, entire, short-stalked or sessile, 

 1-5 cm. long; bracts linear-oblong, mucronate; pedicels slender, 10-12 mm. long; 

 flowers yellow; petals about I cm. long; pod linear, 3-8 cm. long, acute, borne on 

 a stipe becoming longer than the pedicel. In dry soil, Neb. to Wash, and Ariz. 

 June -Sept. 



2. CRISTATELLA Nutt. 



Annual viscid glandular-pubescent herbs, with digitately 3-foliolate leaves, and 

 small white or yellowish flowers in terminal bracted racemes. Sepals spreading, 

 slightly united at the base. Petals 4, laciniate or fimbriate at the summit, borne 

 on long slender claws, the two lower smaller than the two upper. Receptacle 

 short, with a short petaloid nectary between the ovary and the upper sepal. Sta- 

 mens 6-14; filaments slender, declined. Ovary stalked, also declined. Capsule 

 linear, nearly terete, many-seeded. [Diminutive of cristatus, crested.] Two 

 species, natives of the south-central U. S. 



i. Cristatella Jamesii T. & G. JAMES' CRISTATELLA. (I. F. f. 1794.) 

 Erect, 1.54 dm. high. Leaves slender-petioled; leaflets nearly sessile, linear or 

 linear-oblong, entire, obtuse, 8-25 mm. long; flowers slender- pedicelled; bracts 

 mostly 3-foliolate; claws of the larger petals 3-5 mm. long; pod much longer than 

 its stipe and somewhat longer than the pedicel. In dry soil. Neb. to La. and Tex. 

 June-Dec. 



3. CLEOMELLA DC. 



Annual glabrous herbs, with small yellow flowers and 3-foliolate leaves. Calyx 

 of 4 sepals. Petals 4, sessile, not clawed. Receptacle short, glandless. Stamens 

 6, inserted on the receptacle. Ovary short, long-stalked. Capsule short, rhom- 

 boid or trapezoid, often broader than long, 4-io-seeded. [Diminutive of Cleome.] 

 About 8 species, natives of southwestern N. Am. and Mex. 



i. Cleomella angustifolia Torr. NORTHERN CLEOMELLA. (I. F. f. 1795.) 

 Branching above, 3-5 dm. high. Leaflets linear-lanceolate or linear-oblong ; bracts 

 linear, simple; flowers 4-6 mm. broad; pedicels 1-1.5 cm - l n g ^ n fruit; pod 

 rhomboid, 4-6 mm. broad, pointed, raised on a slender stipe 4-8 mm. long, its 

 valves almost conic; placentae persistent after the valves fall away, each bearing 

 about 3 seeds. Prairies, Neb. and Colo, to Tex. and N. Mex. Summer. 



4. POLANISIA Raf. 



Annual herbs, mainly glandular-pubescent, with whitish or yellowish flower.;, 

 and palmately compound or rarely simple leaves. Sepals 4, lanceolate, deciduous. 

 Petals slender or clawed. Receptacle depressed, bearing a gland at the base of 

 the ovary. Stamens 8-00 , unequal. Pod nearly or quite sessile, elongated, cylin- 

 dric or compressed, its valves dehiscent from the summit. Seeds rugose or reticu- 

 lated. [Greek, very unequal, referring to the stamens.] About 14 species, of 

 temperate and tropical regions. 



Stamens equalling or slightly exceeding the petals; flowers 4-6 mm. long. 



i. P. graveolens. 

 Stamens much exceeding the petals ; flowers 8-12 mm. long. 2. P. trachysperma. 



i. Polanisia graveolens Raf. CLAMMY-WEED. (I. F. f. 1796.) Viscid, 

 1-4.5 dm. high- Leaves 3-foliolate, slender-petioled; leaflets oblong, obtuse, entire, 

 1-2.5 cm. long; sepals purplish, slightly unequal; petals cuneate, emarginate or 

 obcordate ; stamens 9-12, purplish, equalling or slightly exceeding the petals; 



