CRUCIFERAB (MUSTAKD 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. TENUIFOLIA (L.) DC. Similar but perennial and more caulescent ; 

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

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



17. CONRlNGIA [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 Conring of Helmstadt, 1606-1661.) 



1. C. ORIENTALS (L.) Dumort. Tall, slightly succulent ; flowers pale yellow. 

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

 common. (Adv. from Eu.) 



18. ALLlARIA Adans. GARLIC MUSTARD 



Pods long, linear, angled ; valves keeled, 3-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. OFFICINXLIS Andrz. Tall; pods 2.6-5 cm. long, spreading, borne on 

 short thick pedicels. (A. Alliaria Britton.) Roadsides and near habitations, 

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



19. SISYMBRIUM [Tourn.] L. HEDGE MUSTARD 



Pod terete, flattish 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 1. S. officinal*. 



Pods linear-cylindric, longer. 



Pods firm, 6-10 cm. long .... 2. S, altimrimum. 



Pods delicate, 3-i mm. long 8. & Irio. 



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

 pods delicate. 



Seeds 2-ranked in each cell 4. S. canencent. 



Seeds 1-ranked in each cell. 

 Leaves pinnatifid or bipinnatifld ; pods 6-15 mm. long . . . . 6. S. inciitum. 



Leaves tripinnate ; pods about 2 cm. long 6. S. Sophia. 



Leaves chiefly basal, entire or barely toothed 1. S. T/ialianum. 



1. S. OFFICIN\LE (L.) Scop. Leaves 

 runcinate ; flowers small, yellow ; pods thick- 

 walled, at maturity firm in texture, pubes- 

 cent or tomentulose, close-pressed to the 

 few-branched stem, scarcely stalked. 

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

 Cal., etc. (Adv. from Eu.) FIG. 769. 



Var. LEiocARPUM DC. Pods essentially 

 glabrous. A common and unsightly weed. 

 (Nat. from Eu.) 



2. S. ALTfssiMUM L. (TUMBLE Mus- 

 TA RD. ) Tall ; leaves deeply pinnatifid with 

 narroio segments ; flowers pale yellow ; pods 

 rigid, very long, divergent, hardly thicker 

 than the short thickish pedicels. Waste 



759. S. officinale. 

 Leafx%. 



760. S. altissimum. 



places, roadsides, etc., a recent immigrant, locally abundant Leaf and part of fruit- 

 as a pernicious weed. (Nat. from Eu.) FIG. 760. ingrmceme x /,. 



