MUSTARD FAMILY 363 



reflexed; pod 6-8 cm. long, 2 mm. wide. Sandy or stony ground: Wyo. Mont. 

 Ida. Submont. Mont. Je-Jl. 



47. A. caduca A. Nels. Biennial or perennial; stem 2-4 dm. high, slender, 

 sparingly stellate; basal leaves narrowly oblanceolate, 1-2 cm. long, densely and 

 finely stellate; stem-leaves linear, mostly revolute; sepals stellate; petals white, 

 5 mm. long; pedicels abruptly reflexed; pod 1.5-3.5 cm. long, nearly 2 mm. wide. 

 Mountains: Wyo. -Utah. Submont. Jl-Au. 



48. A. canescens Nutt. Perennial; stems 2-3 dm. high, finely stellate; 

 basal leaves densely stellate-canescent, 1-2 cm. long; stem-leaves linear; sepals 

 stellate; petals white or pale purplish, 4-5 mm. long; pedicels recurved; pods 

 pendulous, 3-5 cm. long, 1.5-2 mm. wide; seeds more or less in two rows. (?) A. 

 puberula Nutt. Dry plains: Wyo. Mont. Ore. Submont. Ap-Je. 



49. A. exilis A. Nels. Biennial; stems strict, slender, 3-4 dm. high; basal 

 leaves small, 1-2 cm. long, oblanceolate or oblong-spatulate; stem-leaves lance- 

 olate; sepals stellate; petals white or purplish, 5-6 mm. long; pedicels reflexed; 

 pods pendent, 4-6 cm. long, 2 mm. wide; seeds in two rows. Sage-brush plains: 

 Wyo. Mont. Utah. Son. Mont. Je-Au. 



60. A. pendulocarpa A. Nels. Perennial; stem simple, about 2 dm. high; 

 basal leaves oblong-oblanceolate, 1 cm. or less long; stem-leaves linear-oblong 

 or lanceolate, 5-10 mm. long; petals about 5 mm. long, white or tinged with 

 purple; pedicels recurved; pod 4-6 cm. long, 2 mm. wide; seeds in two rows. 

 Cliffs and rocky ridges: Wyo. Submont. Je. 



41. PARRYA R. Br. 



Acaulescent perennials, with branched caudex. Flowers perfect, racemose. 

 Sepals oblong, erect, the lateral ones gibbose at the base. Petals pink or purple, 

 with long claws and broad blades. Anthers included, oblong, sagittate at the 

 base. Pods with flat, 1-nerved, reticulate valves; stigma 2-lobed. Seeds mar- 

 gined or winged; cotyledons strictly accumbent. 



1. P. platycarpa Rydb. Leaves basal, runcinate, more or less glandular- 

 hirsutulous, thick, 6-8 cm. long, oblanceolate in outline; scape 1-1.5 cm. long, 

 glandular-hirsutulpus; petals 15-18 mm. long, purplish; fruiting pedicels 8-15 

 mm. long, ascending; pod erect, glandular-hispidulous, 3-4 cm. long, 6-7 mm. 

 wide, acute at both ends; seeds broadly winged, 3-4 mm. wide. P. macrocarpa 

 S. Wats., not R. Br. High mountains: Utah. Alp. Subalp. Jl-Au. 



42. PHOENOCAULIS Nutt. 



Low leafy perennials, with thick caudex. Flowers perfect, racemose. Sepals 

 erect, the lateral gibbose at the base. Petals purple or pink, long-clawed. Pods 

 flat, with 1-nerved, reticulate valves, few-seeded, tapering into a slender style; 

 stigma nearly entire, capitate. Seeds marginless; cotyledons obliquely accumbent . 



Pod linear-lanceolate, 3-5 mm. wide; seed-coat not cellular. 1. P. cheiranthoides. 



Pod lanceolate. 7-10 mm. wide; seed-coat cellular. 2. P. Huddelliana. 



1. P. cheiranthoides Nutt. Stem 1-3 dm. high; basal leaves numerous, 

 petioled, densely white stellate-tomentose, oblanceolate, entire, 5-10 cm. long; 

 stem-leaves small, ovate to lance-linear, in age glabrate; petals about 8 mm. 

 long; fruiting pedicels 1-1.5 cm. long, divaricate; pod horizontal, 2-4 cm. long, 

 glabrous. Parrya Menziesii (Hook.) Greene. Mountains: Wash. Ida. 

 Nev. Calif. Submont. Mont. Ap-Je. 



2. P. Huddelliana (A. Nels.) Rydb. Perennial, with a branched slender 

 deep rootstock; leaves rosulate, narrowly spatulate, 12-25 mm. long, densely 

 stellate-pubescent; flowers corymbose; branches 1-1.5 cm. long; pod lanceolate, 

 2-3 cm. long, tapering into a short style. Parrya Huddelliana A. Nels. High 

 mountains among loose rocks: Ida. Alp. Jl. 



43. CARTIERA Greene. 



Glabrous perennials, with fleshy leaves, the cauline ones cordate-clasping. 

 Flowers perfect, in elongate racemes. Calyx urn-shaped; lateral sepals saccate 



