CRUCIFEUAE (MUSTARD FAMILY) 



429 



natifid with short lobes ; flowers small ; fruiting pedicels 8-16 mm. long, spread- 

 ing; pods linear-terete, erect. — About Atlantic ports, and rarely inland. (Adv. 

 from Eu.) 



2. D. TEXLiFOLiA (L.) DC. Similar but perennial and more caulescent; 

 leaves pinnatifid, and lobes longer ; flowers larger, 1 cm. long; pedicels in fruit 

 2-3 cm. long. — Similar localities. (Adv. from Eu.) 



17. CONRINGIA [Heist.] Link. Hare's-ear Mustard 



Pods long, linear. 4-angled, somewhat rigid. Seeds oblong, one row in each 

 cell. Cotyledons incumbent. — Glabrous annuals with sessile elliptic entire stem- 

 clasping leaves. (Named for Prof. Hermann Coming of Helmstadt, 1606-1(>01.) 



L C. ORiENTALis (L.) Dumoit. Tall, slightly succulent ; flowers pale yellow. 

 (C. perfoliata Link.) — Waste places and newly seeded ground, becoming more 

 common. (Adv. from Eu.) 



18. ALLIARIA Adans. Garlic Mustard 



Pods long, linear, angled ; valves keeled, 8-nerved ; stigma simple, sessile or 

 nearly so. Oval sepals caducous. Pubescence simple or none. — Ours biennial 

 with deltoid-ovate cordate dentate petiolate leaves and small white flowers. 

 (Name from Allium., onion or garlic, referring to the odor.) 



1. A. officixXlis Andrz, Tall; pods 2.5_.5 cm. long, spreading, borne on 

 short thick pedicels. {A. AUiaria Britton.) — Roadsides and near habitations, 

 eastw., local. (Introd. from Eu.) 



19. SISYMBRIUM [Tourn.] L. Hedge Mustard 



Pod terete, flatfish or 4-6-sided, the valves 1-3-nerved. Seeds oblong, margin- 

 less, in 1 or 2 rows in each cell. Cotyledons incumbent. Calyx open. — Flowers 

 small, white or yellow. Pubescence spreading. (Latinized from an ancient Greek 

 name for some plant of this family.) Ours are mostly annuals or biennials. 



Leafy-stemmed: leaves pinnate or pinnatifid. 



Stigma 2-lobed ; pubescence, when present, of simple hairs. 



Pods awl-shaped. 1-1.5 cm. long \. S. officinale. 



Pods linear-cjlindric, longer. 



Pods firm. 6-10 cm. long 2. S. altissimum. 



Pods delicate, 3-4 mm. long , . . . . S. S. Irio. 



Stigma simple : pubescence forked or stellate, or reduced to minute granules ; 

 pods delicate. 



Seeds 2-ranked in each cell ^, S. canescens. 



Seeds 1-ranked in each cell. 

 Leaves pinnatifid or bipinnatifid ; jiods 6-15 mm. long . . . . h. S. incinum. 



Leaves tripinnate ; pods about 2 cm. long &. S. Sophia. 



Leaves chiefly basal, entu-e or barefy toothed 1. S. Thalianum. 



1. S. OFFICINALE. (L.) Scop. Leavcs 

 runcinate ; flowers small, yellow ; pods thick- 

 ivalled, at maturity firm in texture, pubes- 

 cent or tomentiilose, close-pressed to the 

 few-branched stem^ scarcely stalked. — 

 Waste ground. Me. and Out., local ; also 

 Cal. . etc. (Adv. from Eu.) Fig. 759. 



Var. LEiocARPUM DC. Pods essentially 

 glabrous. — A common and unsightly weed. 

 c:| p (Nat. from Eu. ) 



jT 2. S. altissimum L. (Tumble ]\Ius- 



|1' TARD.) Tall ; leaves deeply pinnatifid irith 



narroiv segments ; flowers pale yellow ; pods 

 rigid, very hmg, divergent, hardlij thicker 

 than the short thickish pedicels. — Waste 

 places, roadsides, etc., a recent immigi'ant, locally abundant 

 as a pernicious weed. (Nat. from Eu.) Fig. 760. 



759. S. officinale. 

 Leaf X %. 



Tt'tO. S. altissimum. 

 Leaf and fiart of fruit- 

 ing raceme x Vg. 



