no 



CRUCI FERAE. 



[VOL. II. 



2. THELYPODIUM Endl. Gen. 876. 1839. 



[PACHYPODIUM Xutt. 1838. Not Lindl. 1830.] 



Erect glabrate biennial or perennial herbs, with simple entire toothed or pinnatifid leaves, 

 and racemose purplish or white flowers. Siliques nearly terete, linear, with a short stipe in 

 some species; valves i-nerved, dehiscent; style short; stigma nearly entire. Seeds in i row 

 in each cell of the pod, oblong, marginless; cotyledons obliquely incumbent. [Greek, 

 female-stalk, from the stiped ovary.] A genus of about , 8 sp e cieSi na tives of North Amer- 



ica. All but the following occur only in the western 

 part of the continent. 



i. Thelypodium integrifdlium (Nutt.) 

 Endl. Entire-leaved Thelypodium. 



(Fig. 1682.) 

 Pachypodium inlegrifolium Nutt.; T. & G. Fl. N. 



A. 1:96. 1838. 

 Thflypodium integrifoliutn Endl.; Walp. Rep. i: 



172. 1842. 



Glabrous, erect, branching above, 3-6 high. 

 Leaves entire, thickish, the basal and lower ones 

 petioled, narrowly oval or oblong, 2'-4' long, the 

 upper or sometimes nearly all the cauline ones 

 sessile, linear, lanceolate or oblong-lanceolate, 

 acute or acuminate; flowers pink, in short dense 

 racemes; pedicels slender, spreading, 2 / '-4 // long; 

 petals obovate or spatulate, long-clawed; pods 

 narrowly linear, about i' long and %" wide; stipe 

 very short; style slender, nearly i" long. 



Nebraska and Wyoming to Oregon, Utah and New 

 Mexico. July-Sept. 



1753- 



3. SUBULARIA L. Sp. PI. 642. 



Small annual aquatic submersed herbs, with basal lin- 

 ear subulate leaves, and minute racemose white flowers. 

 Silicles short-stipitate, oblong or elliptic, the valves con- 

 vex, ribbed on the back. Stigma sessile, entire. Seeds 

 few, in 2 rows in each cell, marginless. Cotyledons in- 

 cumbent, curved above their base. [Latin awl, from the 

 awl-shaped leaves.] 



A monotypic genus of the northern hemisphere. 



i. Subularia aquatica L. Water Awlwort. 



(Fig. 1683.) 

 Subularia aquatica L. Sp. PI. 642. 1753. 



Tufted, glabrous, \'-\' high, growing on the bottoms of 

 lakes in shallow water. Flowering scape simple, lateral; 

 leaves nearly cylindric, 6"-i5" long; flowers few, race- 

 mose, distant; pedicels slender, i"-3"long in fruit; petals 

 white, minute; pods oblong or globose, i"-i#" long; 

 seeds several in each cell; style none. 



In clear, cold lakes, Newfoundland to British Columbia, 

 Maine, New Hampshire and Ontario, south in the Rocky 

 Mountains to Wyoming, and to California. Also in Europe 

 and Siberia. June-Sept. 



4. LEPIDIUM L. Sp. PI. 643. 1753. 



Erect, or rarely diffuse, glabrous or pubescent herbs, with pinnatifid lobed or entire leaves 

 and racemose white or whitish flowers. Stamens often fewer than 6. Petals short, some- 

 times none. Silicles oblong or obovate, flattened contrary to the partition, winged or wing- 

 less; valves keeled, dehiscent. Seeds solitary in each cell, flattened; cotyledons incumbent 

 or rarely accumbent. [Greek, a little scale, from the flat scale-like pods.] 



About 65 species, widely distributed. In addition to the following, about 16 others occur in 

 western North America. Called indifferently Cress, Pepperwort or Pepper-grass. 



Stem-leaves clasping by an auriculate base. 



Pods broadly ovate, winged. 



Pods wingless, broader than long. 

 Stem-leaves petioled or sessile, not clasping. 



Pods and seeds entirely wingless; petals none. 



1. L. campestre. 



2. L. Draba. 



3. L. ruderale. 



