Voi,. II.] 



MUSTARD FAMILY. 



121 



i. Raphanus Raphanistrum I,. Wild Radish. 



(Fig. 1707.) 



Raphanus Raphanistrum L,. Sp. PI. 669. 1753. 

 Biennial or annual, erect or ascending 

 from a slender root, freely branching, i- 

 2 l /2 high, sparsely pubescent with stiff 

 hairs especially below, or rarely glabrous 

 throughout. Basal and lower leaves 

 deeply lyrate-pinnatifid, 4 / -8 / long, with a 

 large terminal lobe and 4-6 pairs of succes- 

 sively smaller lateral ones, all crenate or 

 dentate; upper leaves few, small, oblong; 

 flowers 6 // ~9 // broad, yellow, fading to 

 white, purplish-veined ; pedicels 3 // -8 // 

 long in fruit; pods i'-i>' long, 6-10 

 seeded, nearly cylindric when fresh, con- 

 stricted between the seeds when dry, longi- 

 tudinally grooved, tipped with a conic 

 beak 5 // -io // long. 



In fields and waste places, Pennsylvania to 

 Ontario and New Brunswick. Often a trou- 

 blesome weed. Introduced also in British 

 Columbia. Naturalized from Europe. Native 

 also of northern Asia. Rarely the flowers are 

 purplish throughout. Erroneously called 

 Rape. Summer. 



Jointed or White Charlock. 



-f 



2. Raphanus sativus I,. 

 Garden Radish. (Fig. 1708.) 



Raphanus sativus L. Sp. PI. 669. 1753. 



Similar to the last, but flowers pink or 

 white. Root deep, fusiform or napi- 

 form, fleshy. Pods fleshy, 2-3-seeded, 

 not longitudinally grooved, often 

 equalled or exceeded by the long conic 

 beak. 



Cultivated and occasionally spontaneous 

 for a year or two in gardens or fields, rarely 

 in waste places. Native of Asia. June- 

 Oct. 



15. BARBAREA R. Br. in Ait. Hort. Kew. Ed. 2', 4: 109. 1812. 



Erect glabrous biennial or perennial branching herbs, with angled stems, pinnatifid 

 leaves, and racemose yellow flowers. Stamens 6. Silique elongated, linear, 4-angled. Valves 

 keeled or ribbed. Style short. Stigma 2-lobed or nearly capitate. Seeds in i row in each 

 cell, flat, oblong, marginless; cotyledons accumbent. [Name from St. Barbara, to whom 

 the plant was anciently dedicated.] 



A genus of about 6 species, natives of the temperate zones. 

 Pods obtusely 4-angled, slender-pedicelled; leaf-segments 1-4 pairs. 



Pods divergent or ascending. I. B. Barbarea. 



Pods erect, appressed. 2. B. slricta. 



Pods sharply 4-angled, stout-pedicelled; leaf -segments 4-8 pairs. 3. B. praecox. 



