MUSTARD FAMILY 291 



leaves short-petioled, pinnatifid, lobed or toothed, or sometimes entire, 10-25 mm. long; upper 



leaves sessile or nearly so, entire or lobed; pedicels slender, ascending or spreading, 6-12 mm. 



long in fruit ; pods elliptical or oval, obtuse, rarely emarginate, 3-4 mm. long. 



In moist saline places, Boreal and Austral Zones; British Columbia to southern California, extending to 

 Labrador; also in Europe, Asia, and Australia. Type locality: Montpellier, France. March-June. 



37. CAPSELLA Medic. Pflanzeng. 1: 85. 1792. 



Erect annual herbs pubescent with forked hairs, the basal leaves tufted. Flowers 

 racemose, small, white. Silicles cuneate, obcordate or triangular, compressed at right 

 angles to the septum, the valves boat-shaped, keeled. Style short. Seeds numerous in 

 each cell, marginless ; cotyledons accumbent. [Name Latin, meaning a little box.] 



About 4 species, natives of the northern hemisphere. Type species, Capsella Bursa-pastoris (L.) Medic. 



1. Capsella Bursa-pastoris (L.) Medic. Shepherd's Purse. Fig. 2061. 



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

 Bursa pastoris Weber in Wigg. Prim Fl. Hoist. 47. 1780. 

 Capsella Bursa-pastoris Medic. Pflanzeng. 1:85. 1792. 

 Bursa Bursa-pastoris Britt. Mem. Torrey Club S: 172. 1894. 



Stems erect, branching, 15-40 cm. high, pubescent below, mostly glabrous above. Basal 

 leaves lobed or pinnatifid, forming a rosette, 5-12 cm. long ; stem leaves few, lanceolate, auricled, 

 dentate or entire; pedicels slender, spreading or ascending, 10-15 mm. long; flowers white, about 

 2 mm. broad ; pods triangular, more or less emarginate at the apex, 4-6 mm. long. 



A cosmopolitan weed, very common in gardens and waste places, naturalized from Europe. Jan.-Dec. 



38. CAMELINA Crantz, Stirp. Aust. 1 : 18. 1762. 



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

 flowers in terminal racemes. Stamens 6, styles slender. Silicles obovoid or pear-shaped, 

 slightly flattened parallel to the partition; valves strongly convex, 1-nerved. Seeds sev- 

 eral to many in each cell, arranged in 2 rows, oblong, marginless ; cotyledons incumbent. 

 [Name Greek, meaning low flax.] 



About 5 species, natives of Europe and Asia. Type species, Camelina sativa (L.) Crantz. 



Plants glabrous, or nearly so; pod 6-8 mm. long. 1. C. sativa. 



Plants pubescent at least below; pod 4-5 mm. long. 2. C. microcarpa. 



1. Camelina sativa (L.) Crantz. False or Dutch Flax. Fig. 2062. 



Myagrum sativum L. Sp. PL 641. 1753. 

 Camelina sativa Crantz, Stirp. Aust. 1: 18. 1762. 



Plants glabrous or nearly so, the stems simple or branching above, 3-8 dm. high. Basal leaves 

 petioled, 5-8 cm. long, lanceolate, acutish, toothed or entire ; the upper sessile, clasping by a 

 sagittate base, smaller, mostly entire; racemes many-flowered; pedicels slender, spreading, 15-20 

 mm. long ; pod obovoid or pear-shaped, margined, 6-8 mm. long. 



Sparingly introduced in western Washington and Oregon. Native of Europe. June— July. 



2. Camelina microcarpa Andrz. Small-fruit False Flax. Fig. 2063. 



Camelina microcarpa Andrz. ex DC. Syst. 2: 517. 1821. 



Stems hirsute below, erect, simple or with a few elongated branches, 3-9 dm. high. Leaves 

 sessile and auricled or the lower narrowed at base, entire or nearly so, stellate-pubescent ; fruit- 

 ing raceme often 20-30 cm. long; pedicels usually less than 15 mm. long; pod 4-5 mm. long, 

 strongly margined. 



Sparingly _ introduced in western Washington and Oregon. Native of Europe and closely related to the 

 preceding species. May-July. 



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



Hispid annual, with erect, branching, leafy stems, and entire leaves. Flowers small, 

 yellow, racemose. Silicles small, globose, wingless, reticulated, 1-celled, 1-2-seeded, in- 

 dehiscent; style filiform. Seed horizontal; cotyledons incumbent. [Name in honor of the 

 French botanist J. A. N. de Nesle.] 



A monotypic genus of Europe and eastern Asia. 



1. Neslia paniculata (L.) Desv. Ball Mustard. Fig. 2064. 



Myagrum paniculatum L. Sp. PI. 641. 1753. 

 Neslia paniculata Desv. Journ. Bot. 3: 162. 1814. 



Stems slender, branched above, rough-hispid with forked hairs, 3-6 dm. high. Leaves lanceo- 

 late or the upper linear-lanceolate, sagittate-clasping, 2.5-6 cm. long; racemes elongated; petals 

 yellow, 2 mm. long ; pedicels filiform, ascending, 6-10 mm. long ; pods subglobose, about 2 mm. 

 in diameter, finely reticulated. 



In moist places, native of Europe; sparingly naturalized in Washington and British Columbia. May- 

 Sept. 



