STANDLEY — FLOKA OF GLACIER PARK. 347 



Annual or biennial, 10 to 40 cm. high, erect or spreading, glabrous or nearly bo; petals 

 2.5 mm. long. 



2. Radicula lyrata (Nutt.) Greene. East entrance, about pools. Wash, to Calif. 

 Colo., and Mont. — Stems glabrous or nearly so; petals about 1 mm. long; pedicels 



1 to 3 mm. long. 



3. Radicula palustris (L.) Moench. Frequent at low altitudes, in wet thickets or 

 about pools. Alaska to Mex., Ga., and Lab.; also in Eur. and Asia. (R. terrestris 

 Woot. & Standi. )^Stems glabrous or nearly so, sometimes 60 to 90 cm. high; petals 



2 mm. long. 



9. NORTA Adans. 



1. Norta altissima (L.) Britton. Tumble mustard. Frequent at low altitudes, 

 in waste ground or on open slopes. Native of Eur. ; naturalized as a weed in N. Amer. 

 {Sisymbrium aliissimum L.) — Annual, 0.5 to 1 meter high, much branched, hairy 

 below; leaves deeply lobed, the lobes linear or oblong; petals yellowish white, 6 to 8 

 mm. long; pods slender, cylindric, 7 to 10 cm. long. 



10. DIPLOTAXIS DC. 



1. Diplotaxis erucoides (L.) DC. Along railroad at east entrance. Native of Eur. — 

 Annual, 30 to 60 cm. high, branched; leaves deeply lobed, the lobes oblong, toothed 

 or lobed; petals pale yellow, 6 to mm. long; pods short-beaked. 



This species is of rare occurrence in the United States, and it is not reported in 

 any of the manuals. It seems to be fairly well established at this locality. 



11. SOPHIA Adans. Tansy mustard. 



Annuals or biennials, the pubescence of fine branched hairs; leaves 2 or 3 times 

 lobed, with small lobes; petals small, yellow; pods slender, cylindric or club-shaped. 



Pedicels erect 1. S. hartwegiana. 



Pedicels ascending or spreading. 

 Pods somewhat club-shaped, 5 to 10 mm. long; seeds in 2 rows . 2. S. intermedia. 

 Pods linear, usually 10 to 20 mm. long; seeds in 1 row. 



Pods 15 to 20 mm. long 3. S. parviflora. 



Pods 10 to 15 mm. long. 



Stems densely covered with fine branched hairs, not glandular . 4. S. gracilis. 

 Stems with few or no branched hairs but with fine gland-tipped hairs. 



5. S. calif ornica. 



1. Sophia hartwegiana (Fourn.) Greene. Occasional on the east slope at low alti- 

 tudes, in aspen woods or by roadsides. B. C. to Colo, and Minn. — Stems 0.4 to 1 meter 

 high, covered with fine branched hairs; petals 2 to 3 mm. long; pods 6 to 12 mm. long, 

 linear or club-shaped. 



2. Sophia intermedia Rydb. Open banks, east entrance. B. C. to Calif., Colo., 

 Tenn., and Mich. — Plants green, glabrate; petals scarcely longer than the sepals. 



3. Sophia parviflora (Lam.) Standi. Thin woods about Belton; scarce. Native of 

 Eur.; naturalized in N. Amer. (S. sophia Britton; Sisymbrium sopMa L.; Sisym- 

 brium parviflorum Lam.) — Plants 30 to 80 cm. high, grayish; petals yellowish; pods 1 

 mm. thick. ' 



4. Sophia gracilis Rydb. East entrance, frequent on open slopes. Wash, to Mack, 

 and Colo. — Leaves grayish, divided into very small, narrow lobes; petals 2 mm. long; 

 pods 1 mm. thick. 



5. Sophia califomica (Torr. & Gray) Rydb. Frequent at middle altitudes and often 

 above timber line, in woods or on open slopes. B. C. to Calif, and Mont.^ — Plants 

 slender, 30 to 60 cm. high, green; petals bright yellow, 3 mm. long. 



