308 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
2. Drosera longifolia L. Sp. Pl. 1: 282. 1753. 
Drosera anglica Huds. Fl. Angl. 135. 1778. 
Tyee Locauity: “Habitat in Europa ubique.” 
RanGE: Subarctic regions, southward to Newfoundland, Idaho, and California. Europe. 
Asia. 
SPECIMENS EXAMINED: Mount Adams, Henderson; Falcon Valley, Suksdorf 371. 
ZONAL DISTRIBUTION: Canadian. 
CRASSULACEAE. Sronecrop FAMILY. 
Flowers solitary axillary; annual... ............-.-----.-.-2--------- TILLAEASTRUM. 
Flowers cymose; perennials or biennials. 
Leaves serrate; flowers purple. ...........-.-.-.---------------- RHODIOLA. 
Leaves entire; flowers yellow. 
Petals free to the base... ......-. eee eee ee ee ee eee eee eee SEDUM. 
Petals united below the middle............----.------------- GORMANIA. 
1. TILLAEASTRUM. 
Leaves obtuse; pedicels as long as the leaves ........-- eee ee ee eee 1. T. drummondit. 
Leaves acute; ‘pedicels very short ........-.-.------- ween eee eee 2. T. aquaticum. 
1. Tillaeastrum drummondii (Torr. & Gr.) Britton, Bull. N. Y. Bot. Gard. 3: 1. 1903. 
Tillaea drummondii Torr. & Gr. Fl. 1: 558. 1840. 
Type Locaity: Texas. Collected by Drummond. 
Rance: Washington to California and Louisiana. 
SPECIMENS EXAMINED: Lake Chelan, Gorman 693. 
2. Tillaeastrum aquaticum (L.) Britton, Bull. N. Y. Bot. Gard. 3: 1. 1908. 
Tillaea aquatica L. Sp. Pl. 1: 128. 1753. 
Tillaea angustifolia Nutt. Torr. & Gr. Fl. 1: 558. 1840. 
Type LocALiry: European. 
Rance: Washington to Nova Scotia, southward to Lower California, Texas, and Mary- 
land. Europe. 
SPECIMENS EXAMINED: Parker, Elmer, July, 1898. 
RHODIOLA. 
1. Rhodiola integrifolia Raf. Atl. Journ. 1: 146. 1832. 
Sedum frigidum Rydberg, Bull. Torr. Club 28: 282. 1901. 
Type Locauity: “On the Rocky Mountains.” 
Rance: Alaska to California and Colorado. 
SPECIMENS EXAMINED: Cascade Mountains, latitude 49°, toward Fort Colville, Lyadd in 
1860; Mount Adams, Suksdorf 547, 859; Mount Stuart, Brandegee 773. 
SEDUM. STONECROP. 
Leaves spatulate, very glaucous............-...-.----------- seeeee 1. S. spathulifolium. 
Leaves not spatulate nor glaucous. 
Leaves subglobose, bright green..........-..--.------------- 2. S. divergens. 
Leaves lanceolate, broadest at base. 
Leaves becoming scarious; carpels divergent...........-.. 3. S. douglasi. 
Leaves not becoming scarious. 
Perennial, carpels erect.........-.-.---------------- 4. S. stenopetalum. 
Biennial, carpels divaricate..........-...-...-.------ 5. S. letbergii. 
1. Sedum spathulifolium Hook. FI. Bor. Am. 1: 227. 1834. 
Type Locauity: ‘Common on dry rocky places of the Columbia and Salmon Rivers.” 
Collected by Douglas. 
