CAPPARIDACEAE. 123 



Thlaspi arvense L. Penny Cress. Annual, erect, glabrous, simple or 

 branched, 15-40 cm. high; radical leaves oblanceolate, petioled; cauline oblong, 

 obtuse, sagittate and half -clasping ; petals white, spatulate, exceeding the 

 sepals; pod orbicular, 8-12 mm. long, broadly winged, deeply notched. A 

 bad weed, sparingly introduced. 



Thlaspi alpestre glaucum A. Nelson. Perennial, glabrous and glaucous; 

 stems usually several from a branched base, 10-20 cm. high; basal leaves ob- 

 ovate or elliptic, petioled, entire or toothed; cauline oblong, entire, sessile 

 and somewhat auriculate; flowers white; pods obovate, emarginate at apex, 

 4-8 mm. long. In the Blue Mountains. 



173. BURSA. 



Slender and mostly smooth annual herbs ; radical leaves tufted ; 

 flowers small, white, in racemes; pod compressed at right angles 

 to the partition, many-seeded. 



Bursa bursa-pastoris (L.) Weber. Shepherd's Purse. Stellate-pubescent 

 below, glabrous above, 30-60 cm. tall, sparingly branched; basal leaves in a 

 rosette, lanceolate or oblanceolate, pinnately-lobed, 2-8 cm. long, dentate or 

 entire; flowers white, about 2 mm. long; pods triangular, cuneate, with a 

 broad shallow notch at the apex. A common weed. 



174. HUTCHINSU. 



Low spreading annual with entire or pinnately-lobed leaves; 

 flowers minute, white, in crowded racemes which elongate in fruit; 

 stigma sessile or nearly so; silicle oval, compressed at right angles 

 to the partition, not cuneate, not notched at the apex; each 

 valve conspicuously 1 -nerved. 



Hutchinsia prociunbens (L.) DC. Branched from the base, glabrous or 

 sparsely pubescent, S-15 cm. high; stems decumbent or ascending; basal 

 leaves pinnately lobed or entire; petioles 1-2 cm. long; cauline leaves spatulate 

 or oblanceolate, sessile, entire, or with a few lobes; petals white, about as 

 long as the sepals, 1 mm. long; pods smooth, elliptic, 3-4 mm. long, on slender 

 pedicels. 



Family 42. CAPPARIDACEAE. Caper Family. 



Herbs with alternate mostly palmate leaves; flowers with 

 petals in the form of a cross; stamens 6 or more but not tetra- 

 dynamous; pod 1 -celled with 2 parietal placentae; seeds kidney- 

 shaped. 



175. CLEOME. 



Annuals with flowers in bracted racemes; petals entire, with 

 claws; stamens 6; receptacle produced between the petals and 

 stamens; ovary stipitate; pod linear to oblong, many-seeded. 



Flowers yellow. C. lutea. 



Flowers purple. C. serrulata. 



