CRUCIFEKAE (MUSTARD FAMILY) 



429 



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

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

 :^om Eu.) 



2. D. tencif6lia (L.) DC. Similar but perennial and more caulescent ; 

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

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



17. CONRfNGIA [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 Frof. Hermann Conring of Helmstadt, 1606-1661.) 



1. C. orientAlis (L.) Dumort. 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, 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 2.5-5 cm. long, spreading, borne on 

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

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



19. SIS"^BRIUM [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 pinnatifld. 

 Btigraa 2-lQbed \ pubescence, when present, of simple faairs. 



Pods awl-shaped, 1-1.5 cm. long 



Pods linear-cylindric, longer. 



Pods Arm, 6-10 cm. long 



Pods delicate, 3-4 mm. long 



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

 pods delicate. 

 Seeds 2-ranked in each cell 

 Seeds 1-ranked in each cell. 



1. S. officinale. 



2, 8. aiiiasim.'um. 

 8. S. Irio. 



Leaves pinnatifld or bipinnatifid ; ^ 

 Leaves tripinnate ; pods about 2 cm. long 



pods 6-15 mm. long 

 _ ^ ^ cm. Ic 



Leaves chiefly basal, entire or barely toothed 



1. S. officinXle (L.) Scop. 



4. S. canescens. 



5. S. ineisum. 



6. & Sophia. 



7. S. Tnalianwrn,. 



759. S. oflicinale. 

 Leaf X %. 



OFFICINALE (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. 759. 



Var. leiocAbpcm DC. Pods essentially 

 glabrous. — A common and unsightly weed. 

 (Nat. from Eu.) 



2. S. ALTfssiMUM L. (Tumble Mus- 

 tard.) Tall; Peaces deeply pinnatifld M«A 

 narrow segments ; flowers pale yellow ; pods 

 rigid, very long, divergent, hardly thicker 

 than the short thickish pedicels. — Waste 760. 8. altissimum. 



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

 as a pernicious weed. (Nat. from Eu.) Fig. 760. ing raceme x Vs- 



