MUSTARD FAMILY 323 



Anthers not subsagittate at the base. 



Pod short, from orbicular to linear-oblong. 



39. Draba. 

 Pod elongated-linear. 



Cotyledons accumbent. 40. Ak.vbis. 



Cotyledons incumbent. 23. Conringia. 



Anthers subsagittate at the base. 



Stigma 2-lobed; seeds margined; cotyledons strictly accum- 

 bent. 41. P.ARRTA. 

 Stigma entire, capitate; seeds marglnless ; cotyledons obliquely 

 accumbent. 42. Phaenicaulis. 

 2. Anthers sagittate at the base. 



Calyx um-shaped, closed; blades of the petals narrow, undulate-crisp. 

 Cotj'ledons acciunbent; stem not succulent; flowers small. 



43. C.ARTIERA. 



Cotyledons incumbent; stem more or less succulent; flowers comparatively 

 large. 44. Caulanthtjs. 



Calyx campanulate, open; petals ample. 



iPod flat; anthers neither curved nor twisted. 

 Stigma 2-Iobed. 



Lobes of the stigma over the placentae; perennials. 



41. Parrta. 

 Lobesof the stigmas over the valves; annuals. 45. Strept.\ntell.\. 

 Stigma entire, capitate; seeds marginless. 



Cotyledons obUquely accumbent; low perennials, with pink or 



purplish flowers. 42. Phaexocaulis. 



Cotyledons incumbent; tall leafy plants, with greenish flowers. 



46. CHLOROCR-^IBE. 



Pod terete or tetragonal; anthers curved oi twisted (except in Schoeno- 

 crambe). 

 Sepals unequal, the lower longer; hairs, at least some of them, stellate 



or branched. 49. Hexerothrix. 



Sepals equal or nearly so; hairs simple or none. 

 Sepals erect or ascending in anthesis. 



Stigma distinctly lobed, its lobes expanded over the septum. 

 Plants with creeping rootstocks. 47. ScHOENOC-R.AMBE. 



Plants with taproots. 48. Thelypodiopsis. 



Stigma entire or, if distinctly lobed, the lobes expanded over 

 the valves. 

 Stigma conical; outer sepals gibbous at the base. 



50. Hesperidanthus. 

 Stigma truncate; sepals scarcely gibbous at the base. 



Septum of the pod without a distinct midrib. 



51. Thelypodium. 

 Septum of the pod with a strong midrib. 



52. Pleurophragma. 

 Sepals strongly spreading or reflexed in anthesis, soon deciduous. 



53. ST.\XI£YELL.\. 



II. Pod terete, long-stipitate; sepals spreading or reflexed in anthesis; anthers curved 

 and spirally twisted. 54. St,4A-leya. 



1. ISATIS L. Wo.AD. 



Annual to perennial herbs. Flowers perfect, racemose. Sepals equal, 

 ascending-spreading, not gibbous at the base. Petals yellow, entire, equal. 

 Stamens 6; filaments not dilated, on a disk. Pod indehiscent, 1-ceUed, l-(rarely 

 2-) seeded, oval to oblong, flattened contrarj' to the partition, winged all around, 

 without style. Cotyledons incumbent. 



1. I. tinctoria L. Biennial; stem 3-10 dm. high; leaves blue-green, the 

 lower oblanceolate, entire or denticulate, the upper sagittate-clasping; racemes 

 several; pod oblong, 12-15 mm. long, 5-7 mm. wide, rounded or retuse at the 

 apex. Waste places: Utah; adv. from Eu. 



2. CARD ARIA Desv. 



Perennial caulescent herbs. Leaves alternate, toothed, the upper clasping. 

 Flowers perfect, in terminal panicles. Petals white. Stamens 6. Ovar\' sessile; 

 styles slender, but short. Pod ovate, cordate at the base, acute at the apex, 

 neither •ninged nor retuse; valves strongl}- convex. Seeds solitarj' in each ca\aty. 

 Cotyledons incumbent. 



1. C. Draba fL.) Desv. Erect perennial, 2.5-5 dm. high, hoarj'-pubescent, 

 branched above; lower leaves oblanceolate, pe'tioled, the upper oblong, ovate, or 

 cordate, clasping, usually dentate; pod 3 mm. long and 4 mm. broad, papillose; 

 style 1-2 mm. long. Lepidum Draba L. Waste places and cultivated ground: 

 N.Y. — Fla. — Calif. — Ida.; adv. or nat. from Eurasia. Ap-Je. 



