VOL. II.] 



MUSTARD FAMILY. 



i. Bursa Bursa-pastdris (I,.) Britton. 

 Shepherd's Purse. (Fig. 1752.) 



Thlapsi Bursa-pastoris L. Sp. PI. 647. 1753. 



Bursa pastoris Weber in Wigg. Prim. Fl. Hoist. 47. 



1780. 



Capsella Bursa-pastoris Medic. Pfl. Gatt. i: 85. 1792. 

 Bursa Bursa-pastoris Britton, Mem. Torr. Club, 5: 



172. 1894. 



Erect, branching, 6 / -2o / high from a long deep 

 root, pubescent below, mainly glabrous above. 

 Basal leaves more or less lobed or pinnatifid, form- 

 ing a large rosette, rarely entire, 2 / -5 / long; stem- 

 leaves few, lanceolate, auricled dentate or entire; 

 flowers white, about i" long; pedicels slender, 

 spreading or ascending, 5 // -7 // long in fruit; pods 

 triangular, cuneate at the base, truncate or emar- 

 ginate at the apex, 2 // -4 // long; seeds 10 or 12 in 

 each cell. 



In fields and waste places, very common. Natural- 

 ized from Europe, and widely distributed as a weed 

 over all parts of the globe. Jan. -Dec. Other names 

 are St. James'-weed, Case-weed, Mother's-heart. 



27. CAMELINA Crantz, Stirp. Austr. i: 18. 1762. 



Erect annual herbs, with entire toothed or pinnatifid leaves, and small yellowish flowers. 

 Silicles obovoid or pear-shaped, slightly flattened; valves very convex, i-nerved. Seeds sev- 

 eral or numerous in each cell, oblong, marginless, arranged in 2 rows. Stigma entire; style 

 slender. Cotyledons incumbent [Greek, low flax.] 



A genus of about 5 species, natives of Europe and eastern Asia. 



i. Camelina sativa (L,.) Crantz. Gold-of- 

 Pleasure. False Flax. (Fig. 1753.) 



Myagrum salivum L. Sp. PI. 641. 1753. 

 Camelina sativa Crantz, Stirp. Austr. i: 18. 1762. 



Pilose-pubescent, or glabrous, simple, or branching 

 above, i-2 high. Lowest leaves petioled, entire or 

 toothed, 2 / ~3 / long, lanceolate, acutish; upper leaves 

 sessile, smaller, clasping by a sagittate base, mostly 

 entire; pedicels slender, spreading or ascending, 6"- 

 ic/'longin fruit; flowers numerous,about3 // long; pod 

 obovoid or pyriform, margined, slightly flattened, 3"- 

 4" long, about 2 // -3 // wide; style slender, 1%" long. 



In fields (especially where flax has been grown) and 

 waste places, frequent or occasional throughout our area. 

 Adventive or naturalized from Europe. Old name Mya- 

 grum. Cultivated in Europe for the fine oil of its seeds; 

 nutritious to cattle. June-July. 



28. NESLIA Desv. Journ. Bot. 3: 162. 1814. 



Annual erect branching herbs, hispid with branched hairs, with entire leaves, and small 

 yellow racemose flowers. Silicles small, globose, wingless, reticulated, indehiscent, i-celled, 

 i-seeded or rarely 2-seeded. Style filiform. Seeds horizontal; cotyledons incumbent. 

 [Dedicated to J. A. N. De Nesle, a French botanist] 



A monotypic genus of Europe and eastern Asia. 



