38 SPRING FLORA 



17. DIPL.OTAXIS. Rocket. 



Annual or perennial herbs with yellow flowers in terminal 

 racemes. Siliques long, slender, terete, with a short beak at 

 apex. Seeds in 2 rows in each cell; marginless; ovoid. 



1. D. temiifolia (L.) DC. (Sisymbriurn tenuifolium L.) Wall 

 Rocket. A bushy perennial, much-branched above; glabrous 

 or sparingly hirsute, 1-4 ft. high. Leaves a foot long or less, 

 pinnately divided; the lobes far apart, often alternately 2- 

 toothed, lanceolate below and linear above. Racemes loose, 

 elongated in fruit. Siliques 1-1% in. long, nearly erect on 

 long pedicels. May-July, in moist waste places. 



ORDER ROSALES. 



CRASSULACE-ffi. Orpine Family. 



Annual or perennial more or less succulent herbs 

 (sometimes shrubby). Leaves alternate or opposite; 

 sessile and exstipulate. Inflorescence cymose or rarely 

 solitary. Flowers regular and symmetrical. Sepals 

 persistent, 4-5-lobed. Petals distinct or slightly united 

 at base (or rarely wanting). Stamens as many or twice 

 as many as sepals. Carpels as many as sepals ; distinct 

 or united below. Fruit a follicle. 



1. SEDUM. Stone Crop. Orpine. 



Glabrous annual, biennial or perennial herbs. Inflores- 

 cence cymose, usually unilateral. Flowers star-like. Sepals 

 4-5; petals 4-5, distinct, usually narrow and sharp-pointed. 

 Stamens twice as many as sepals. Pistils 4-5, ripening into 

 many-seeded follicles. 



Leaves acute 1. S. steuopetalum 



Leaves obtuse 2. S. deblle 



1. S. steiiopetalum Pursh. Stems 3-6 inches high, simple or 

 branched, perennial; tufted. Leaves alternate, sessile, linear, 

 entire; terete or nearly so. Flowers bright yellow, with nar- 

 rowly-lanceolate petals. Carpels spreading. Shaded cliffs 

 among rocks. May-June. 



2. S. debilc Watson. Perennial from a slender rhizome. 

 Stems slender, weak. Leaves round or nearly so, flat; sessile, 

 but narrowed toward the base. Flowers yellow, on rather 

 long pedicels. Petals more or less united at the base. 



SAXIFRAGACE^l. Saxifrage Family. 



Herbs or shrubs. Leaves alternate, opposite or all 

 basal, usually without stipules. Inflorescence solitary, 

 racemose or paniculate. Calyx free from the ovary 

 or adhering to it, usually persistent. Petals usually 



