16 CRUCIPERAE. 



A. CGlycinum L. Plant a small hoary annual, 3-10 inches high, with 

 Linear-spatulate Leaves, and pale yellow or whitish flowers; petals slightly 

 exceeding the persistent calyx; pods orbicular, margined, 2-celled. with 2 

 seeds in each cell. Reported as rare from Story county. 



CAMEL1NA Crantz. Flowers small, yellow. Pods pear-shaped, pointed, 

 flattish parallel to the broad partition: valves 1-nerved. Seeds oblon"-, 

 numerous. 



C. sariva (L.) Crantz. False Flax. Annual; lower leaves lanceolate, 

 petioled, entire or toothed; upper sessile, entire, clasping by a sagittate base; 

 puds large, margined. Waste places, along railways and in flax fields; June- 

 July: infrequent; Winneshiek, Uuchanan, Stoiw, aud Emmet counties. 



RAPriANUS L. Radish. liiennials with lyrate-pinnatifid leaves and 

 showy flowers. Pods linear, terete, long pointed, constricted, indehiscent. 

 Seeds in a single series, globose, cushioned. 



R. sativus L. Stem 2-4 feet high, from a descending fusiform root, 

 branched, covered with scattered spines; leaves petioled. roughW pubescent; 

 flowers white to pinkish. Waste places; June-September; occasionally an 

 escape from cultivation. 



CAPPARIDACEAETw'y^/. Caper Family. 



Herbs, with alternate compound exstipulate leaves, and cruciform 



hypo^ynous flowers. Stamens G or more, never tetradynamous. Fruit 



a 2-\alved, 1-celled pod with 2 parietal placentoe. Seeds many, reni- 



form. 



Polanisia. Stamens 8 or more; pod sessile or nearly so, many seeded. 

 Cleomk. Stamens 6: pod long- stipitate, few-seeded. 



POLANIS1A Raf. Strong scented annuals, with glandular viscid hairs, 

 and palmately compound leaves. Flowers in leafy racemes. Sepals 4. 

 spreading, deciduous. Petals 4, with claws, notched at the apex-. Stamens 

 S-many, unequal. Pod linear or oblong, veiny, many-seeded. 



P. graveolens Raf. Stem 4-15 inches high; leaflets 3, oblong; flowers 

 axillary, solitary, small; calyx and filaments purplish; petals yellowish 

 white, cuneate; stamens about 11, about the length of the petals: styles 

 short: pod 1-3 inches long, slightly stipitate. Sandy shores; May-July: in- 

 frequent; Muscatine and Emmet counties, and reported from a number of 

 other localities. 



P. trachysperma T. & G. Flowers larger; stamens 12-16, long exserted; 

 pod sessile or nearly so. Sandy shores; May-July: common. This and the 

 preceeding species have been confused in Iowa herbaria. 



CLEOME L. Ours a glabrous branching herb, with digitately 3-foliate 

 Leaves and white or rose colored flowers in leafy- bracteate racemes. Sepals 

 and petals 1. Stamens (>. Pod linear or oblong, stipitate, many-seeded. 



C integrifolic; T. & G. Stem erect :2-3 feet high, branching; leaflets 

 lanceolate or oblong, entire or serrulate; calyx 4-cleft: racemes elongated in 

 fruit; bracts lanceolate or linear: stipe and pedicel about equal. Waste 

 places; July-September: common in western Iowa, infrequent elsewhere; 

 .Muse;;) inc. Linn, Woodbury, Monona, Harrison, Pottawattomie, and Fre- 

 mont counties. ((7. serrulata Pursa.) 



Reseda luteota L. of the order Resedaceae S. F. Gray has been 

 reported from Lee county by Arthur. The species is known as Dyers Weed 

 or Weld. It has simple entire sessile lanceolate or linear leaves and green- 



