248 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
CLAYTONIA. 
Perennials with thick roots or corms. 
Vorm globose; cauline leaves oblong. .................... 1. C. lanceolata. 
Caudex elongate; cauline leaves linear-spatulate.......... 2. C. megarrhiza. 
Perennials or annuals; roots not cormose. 
Stems bearing only two leaves, these opposite. 
Jauline leaves not united. 
Pedicels mostly bractless; perennial by rootstocks. 3. C. asarifolia. 
Pedicels mostly with bracts; roots fibrous. 
Perennial, 10 to 50 cm. high; leaves ovate.... 4. (. sibirica. 
Annual, 5 to 15cm. high; leaves narrow.... 5. C. arenicola. 
Yauline leaves united, at least at base. 
United leaves forming a roundish disk. 
Calyx 4 mm. long; seeds 2 mm. broad..... - 6. C. perfoliata. 
Calyx 2 mm. long; seeds 1 mm. broad. 
Basal leaves linear ............2..22.-- 7. C. parviflora. 
Basal leaves ovate............2 2.2.2. 7a. C. parviflora depressa. 
United leaves not forming a disk, but linear or 
lanceolate... 22.2.2... 222 ee eee eee 8. C. spathulata. 
Stems bearing more than two opposite leaves, or leaves 
alternate. 
Cauline leaves several pairs, opposite................ 9. C. chamissoi. 
Cauline leaves alternate. 
Perennial, producing slender stolons; leaves very 
fleshy ......2.222-02-200..2022-2----------.. 10. C. parvifolia. 
Annual, not stoloniferous; leaves not very fleshy. 
Leaves broad, long-petioled; seeds striate .... 11. C. diffusa. 
Leaves narrow, sessile. 
Seeds dull, less than 1 mm. broad _.._. . 12. C. dichotoma. 
Seeds shining. 
Petals 4 mm. long; seeds 2 mm. 
broad.....-.2.2.2.2.2.-.-.-... 13. C. linearis. 
Petals minute or absent; seeds | mm. 
broad... 22222...-2...2-2222 14. C. howellii. 
1. Claytonia lanceolata Pursh, Fl. 1: 175. 1814. 
Type Locauity: “On the Rocky Mountains.” Collected by Lewis, the exact place on 
the Lolo Trail, Bitterroot Mountains, Idaho. 
Rance: British Columbia to Wyoming and California. 
SPECIMENS EXAMINED: Olympic Mountains, Piper 2228; Mount Rainier, Piper 2108; 
Cascade Mountains, latitude 49°, Lyall in 1860; Goat Mountain, Allen 87; Cleman Moun- 
tain, Henderson, June 14, 1892; Klickitat County, Suksdorf, June, 1878; Stevens Pass, 
Sandberg & Leiberg 752; Simcoe Mountains, Howell, June, 1879; Blue Mountains, Horner 
63; Klickitat Hills, Gorman, April, 1895. . 
ZONAL DISTRIBUTION: Hudsonian and Canadian. 
2. Claytonia megarrhiza (A. Gray) Parry; Wats. Bibl. Index 118, 1878. 
Claytonia arctica megarrhiza A. Gray, Am. Journ. Sci. II. 33: 406. 1862. 
Tyre Locatiry: Rocky Mountains. Collected by Parry. 
Rance: Washington to Alberta, Oregon, and Colorado. 
SPECIMENS EXAMINED: Mount Stuart, Elmer 1224; Fish Lake, Dunn, August 4, 1900. 
3. Claytonia asarifolia Bong. Mem. Acad. St. Petersb. VI. 2: 137. 1832. 
Clayionia cordifolia Wats. Proc. Am. Acad. 17: 365. 1882. 
Monta asarifolia Howell, Erythea 1: 39. 1893. 
