248 CONTRIBUTIONS FROM THE NATIONAL, HERBARIUM. 



CLAYTONIA. 



Perennials with thick roots or corms. 



Conn 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. 

 Cauline 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. C. sibirica. 



Annual, 5 to 15 cm. high; leaves narrow... . 5. C. arenicola. 

 Cauline 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 7. C. parviflora. 



Basal leaves ovate 7a. (7. parviflora 



United leaves not forming a disk, but linear or 



lanceolate 8. C spathvdata. 



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 10. C. parvifdia. 



, * ^\nnual, 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. dichotorria. 



Seeds shining. 



Petals 4 mm. long; seeds 2 mm. 



broad 13. C. linearis. 



Petals minute or absent; seeds 1 mm. 



broad 14. C. JioweUii, 



1 . Claytonia lanceolata Pursh, Fl. 1 : 175. 1814. 



Type locauty: "On the Rocky Mountains." Collected by Lewis, the exact place on 

 the Lolo Trail, Bitterroot Mountains, Idaho. 



Range: 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 cfc Leiberg 752; Simcoe Mountains, Howell, June, 1879; Blue Mountains, Homer 

 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. Joum. Sci. II. 33: 406. 1862. 

 TVpe locality : Rocky Mountains. Collected by Parry. 



Range: 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. 

 Claytonia cordifolia Wats. Proc. Am. Acad. 17: 365. 1882. 



Montia asarifolia Howell, Erythea 1 : 39. 1893. 



