302 BRASSICACEAE 



cordate-auriculate ; racemes elongated, loosely flowered ; pedicels ascending, recurved only at 

 the apex, 8-15 mm. long; pods orbicular, 8-10 mm. broad, plano-convex, the wing entire, white- 

 membranous, conspicuously marked with dark slender radiating nerves. 



Grassy plains or hillsides usually in gravelly soil, Upper Sonoran Zone; southern Oregon to the North 

 Coast Ranges and the Sacramento Valley, California. Type locality: Sacramento Valley, California. 



44. SMELOWSKIA C. A. Mey. in Ledeb. Fl. Alt. 3: 165. 1831. 



Low cespitose perennial, with a suffruticose caudex. Leaves pinnatifid, canescent with 

 stellate hairs. Flowers racemose, small, white, yellowish or tinged with purple. Sepals 

 somewhat spreading, sub-equal. Petals obovate, exserted. Pod lanceolate-oblong or ovate, 

 more or less obcompressed ; valves strongly keeled; stigma sessile; seeds few to numer- 

 ous ; cotyledons incumbent. [Name in honor of Timotheus Smielowski, Russian botanist, 

 19th century.] 



A genus of 7 species, natives of northern Asia and western North America. 



Leaf-segments oblong-lanceolate to obovate, usually densely white-tomentose; pods, if compressed, flattened 

 parallel with the partition. 

 Pods ovoid, 4-5 mm. long. 1. S. ovalis. 



Pods linear-lanceolate, acute at both ends. 2. S. calycina. 



Leaf-segments narrowly linear, very sparsely pubescent with forked hairs; pods linear, obtuse at both ends, 

 usually 4-sided, if compressed, flattened contrary to the partition. 3. S. Fremontii. 



1. Smelowskia ovalis M. E. Jones. Alpine Smelowskia. Fig. 2093. 



Smelowskia ovalis M. E. Jones, Proc. Calif. Acad. II. 5: 624. 1895. 



Plants cespitose with a branched caudex, the herbage densely white-villous and finely stellate- 

 pubescent, the stems 3-10 cm. high. Basal leaves pinnatifid, the segments entire or 2-3-cleft; 

 pods ovoid, rounded or subcordate at base, 4-5 mm. long. 



Rocky places at high altitude, Hudsonian and Arctic- Alpine Zones; Cascade Mountains, Okanogan County, 

 Washington, to Three Sisters, Oregon. Type locality: above timber line, Mount Adams, Washington. July- Aug. 



2. Smelowskia calycina (Desv.) C. A. Mey. Siberian Smelowskia. Fig. 2094. 



Hutchinsia calycina Desv. Journ. Bot. 3: 168. 1814. 

 Smelowskia calycina C. A. Mey. in Ledeb. Fl. Alt. 3: 170. 1831. 

 Smelowskia lineariloba Rydb. Bull. Torrey Club 31 : 555. 1904. 



Plants densely cespitose from a stout branched caudex covered with remains of the old 

 leaves, densely canescent with stellate pubescence and a few longer simple hairs, the stems 5-5 cm. 

 high. Leaves deeply pinnatifid, the segments linear to oblong, obtuse; petals 4 mm. long; pods 

 lanceolate, attenuate at each end, 6-10 mm. long. 



Rocky places, Boreal Zones; Alaska, British Columbia, and Alberta to Colorado and Oregon; also Siberia. 

 In the Pacific States it has been collected in the Olympic Mountains, Mount Stuart, and the Wallowa Moun- 

 tains, Washington, and in the Wallowa Mountains, Oregon. 



3. Smelowskia Fremontii S. Wats. Fremont's Smelowskia. Fig. 2095. 



Smelowskia Fremontii S. Wats. Proc. Amer. Acad. 11: 123. 1876. 



Braya pectinata Greene, Erythea 3: 69. 1895. 



Polyctenium Fremontii Greene, Leaflets Bot. Obs. 2: 219. 1912. 



Plants cespitose with a very short mostly simple caudex, the stems tufted, erect, 5-10 cm. 

 high, the herbage thinly pubescent and greenish. Leaves pinnate with narrowly linear bristle- 

 tipped pungent segments ; pedicels and sepals glabrous ; pod linear, 8-10 mm. long, 4-sided or 

 slightly compressed contrary to the partition. 



Grassy places, Boreal and Arid Transition Zones; eastern Oregon to northeastern California. Type 

 locality: "On hills near Klamath Lake," Oregon. May-June. 



Smelowskia Fremontii var. bisulcata (Greene) O. E. Schulz, Pflanzenreich 4 105 : 359. 1924. (Polycte- 

 nium bisulcatum Greene, op. cit. 2: 220.) Rather densely stellate-pubescent; sepals pubescent; pods distinctly 

 compressed contrary to the partition, somewhat bisulcate. Silvies Valley, Blue Mountains, Oregon. 



45. TURRITIS L. Sp. PI. 666. 1753. 



Herbaceous plants with tall stems and partly clasping auriculate leaves. Flowers in 

 elongated racemes. Sepals erect. Petals yellowish white, small. Stamens 6; anthers not 

 sagittate at the base. Stigmas sessile, cupulate. Pod erect, linear-cylindric, terete, the 

 valves 1-nerved. Seeds flattened; cotyledons obliquely incumbent. [Name Latin, mean- 

 ing turreted.] 



A genus of 5 species of wide geographical distribution. Type species, Turritis glabra L. 



1. Turritis glabra L. Tower Mustard. Fig. 2096. 



Turritis glabra L. Sp. PI. 666. 1753. 



Arabis glabra Bernh. Syst. Verz. Erf. 195. 1800. 



Arabis perfoliata Lam. Encycl. 1: 219. 1783. 



Biennial, the stems mostly simple, erect, glabrous and glaucous above, pubescent below, 5-10 



