MUSTARD FAMILY 321 



out. Leaves entire, spatulate, 1-2 cm. long; flowers in racemes 5-15 cm. long; petals pale yellow, 

 cuneate, 2-3 mm. long ; pods on spreading pedicels, orbicular, 3 mm. broad, margined, notched at 

 the apex. 



An introduced plant, becoming well established in various sections of the Pacific States. Native of Europe. 

 April-July. 



50. HESPERIS [Tourn.] L. Sp. PL 663. 1753. 



Erect perennial or biennial herbs, pubescent with forked hairs, the leaves simple. 

 Flowers showy, rose-purple or white, in terminal racemes. Sepals erect, the lateral 

 saccate at base. Petals with broad nearly orbicular blades and slender claws. Pods 

 elongated, nearly terete, torulose; valves dehiscent, keeled, 1-nerved; the partition wall 

 reticulated. Seeds in 1 row in each cell, spherical, wingless; cotyledons incumbent. 

 [Name from Hesperus, evening, when the flowers are most fragrant.] 



About 25 species, natives of Europe and Asia. Type species, Hesperis matronalis L. 



1. Hesperis matronalis L. Dame's Rocket. Fig. 2150. 



Hesperis matronalis L. Sp. PI. 663. 1753. 



Stems erect, branched above, 3-10 dm. high. Leaves ovate or ovate-lanceolate, serrate, 



pubescent ; petals rose-purple or white ; pods slender, spreading, 5-10 cm. long. 



Occasionally escaped from gardens, especially in western Washington and Oregon. Native of Europe and 

 Asia. May-July. 



51. MATTHIOLA R. Br. in Ait. Hort. Kew. ed. 2. 4: 119. 1812. 



Biennial or perennial herbs with stellate pubescence. Flowers often showy. Sepals 

 erect, the lateral saccate at base. Petals with broad rounded blades and elongated claws. 

 Stigma lobes usually prominent, often corniculate, produced above the placentae. Pods 

 elongated, linear, more or less compressed, the partition wall reticulate. Seeds in 1 row, 

 marginless; cotyledons incumbent. [Name in honor of Peter Andrew Matthioli, Italian 

 physician and botanist.] 



A genus of about 50 species, natives of western Asia and the Mediterranean region. Type species, 

 Matthiola incana (L.) R. Br. 



1. Matthiola incana (L.) R. Br. Stock. Fig. 2151. 



Cheiranthus incanus L. Sp. PI. 662. 1753. 



Matthiola incana R. Br. in Ait. Hort. Kew. ed. 2. 4: 119. 1812. 



Stout erect branching biennial or short-lived perennial, cinereous throughout with a short 

 stellate tomentum. Leaves narrowly oblong or linear, entire ; flowers showy, purple varying to 

 white ; pods often 10-12 cm. long. 



Escaped from gardens and established along the coast in central and southern California. Native of 

 southern Europe. April-May. 



Chorispora tenella (Pall.) DC. Syst. 2: 435. 1821. Glandular-puberulent annual, the stems 1-3.5 dm. 

 high, branching. Basal leaves oblanceolate, petioled, sinuate-toothed, 2.5-7 cm. long; stem leaves dentate to 

 entire, short-petioled; sepals oblong, 3-5 mm. long; petals purple, 10-13 mm. long, oblanceolate, narrowed to a 

 slender claw; fruiting pedicels divergent; pods cylindric, 3-4 cm. long, long-beaked; seeds several to many, 

 imbedded in spongy tissue, the pods constricted between the seeds and becoming somewhat moniliform, finally 

 breaking at the constrictions and falling away with the enclosed seed. Recently adventive in eastern Wash- 

 ington (Yakima, Spokane) and Idaho (Lewiston). Native of Asia. 



52. CONRINGIA [Heist.] Adans. Fam. PI. 2: 418. 1763. 



Erect glabrous annual herbs, with sessile clasping leaves or the lower narrowed at 

 base. Flowers in terminal elongated racemes. Sepals and petals narrow. Pod elongate- 

 linear, 4-angled; valves 1-3-nerved, dehiscent. Style short; stigma entire or 2-lobed. 

 Seeds in one row in each cell, oblong, marginless ; cotyledons incumbent. [Name in honor 

 of Herbert Conring, 1606-1681, professor at Helmstadt] 



A genus of about 7 species, natives of Europe and Asia. Type species, Brassica orientalis L. 



1. Conringia orientalis (L.) Dumort. Treacle Mustard, Hare's-ear. Fig.. 2152. 



Brassica orientalis L. Sp. PI. 666. 1753. 

 Erysimum perfoliatum Crantz, Stirp. Aust. 1: 27. 1762. 

 Erysimum orientate R. Br. Hort. Kew. ed. 2. 4: 117. 1812. 

 Conringia perfoliata Link, Enum. Hort. Ber. 2: 172. 1822. 

 Conringia orientalis Dumort. Fl. Belg. 123. 1827. 



Stem erect, usually simple, 3-6 dm. high. Leaves oval to elliptical, deeply cordate-clasping, 



4-10 cm. long ; petals yellowish white, oblanceolate, 8 mm. long ; pod ascending, 8-10 cm. long, 



about 2 mm. thick, 4-angled, spreading ; beak about 1 . 5 mm. long. 



In waste places, naturalized from Europe; British Columbia to California, Colorado, Missouri, Delaware, 

 and New Brunswick. May-Aug. 



