454 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



Specimens examined: Columbia River, latitude 46° to 49°, Lyall in 1860; Egbert Springs, 

 Sandberg cfc Leiberg 379; without locality, Vasei/ 428; Wenaohe, Whited 68; Ellensburg, 

 Whited 489: North Yakima, Wall, August, 1895; Union Flat, Lake cfc Hull 555; Waitsbuig, 

 Horner 404; Almota, Piper 1868: Pullman, Elmer 899; Piper 1625; Mission, Kreager, 

 August 20, 1902. 



Zonal distribution: Upper Sonoran and Arid Transition. 



2. Asclepias mexlcana Cav. Ic. 1: 42. 1791. 



.Asclepias fascicularis Dec. in DC. Prod. 8: 569. 1844. 



Type locality: "Habitat prope Mexico." 



Range: Washington to California, Arizona, and Mexico. 



Specimens examined: Tampico, Flett 1025; Fort Simcoe, Henderson; Spokane, Sand- 

 berg, August, 1892; Dewart, July 15, 1901; Wawawai, Piper 2664; Horner 664. 



Zonal distribution: Upper Sonoran and Arid Transition. 



CONVOLVULACEAE. 



CONVOLVULUS. Morning-glory. 



Calyx without bracts; leaves glabrous.-. 3. C arvensis. 



Calyx inclosed b}- two large bracts. . 



Leaves renifomi, fleshy \.C. soldanella . 



Leaves triangular-sagittate, not fleshy 2. C. sejnum americanus. 



1. Convolvvilus soldanella L. Sp. PI. 1: 159. 1753. 



Type locality: "Habitat in Angliae, Frisiae littoribus maris." 

 Range: Washington to California on the seashore. Europe. 



Specimens examined: Whidby Island, Gardner 219; Copalis, Lanih 1257; Shoalwater 

 Bay, Cooper; Ocosta, Henderson in 1892; Ilwaco, Piper 4999. 

 Zonal distribution: Humid Transition. 



2. Convolvulus sepium americanus Sims, Bot. Mag. 19: pi. 732. 1804. 

 Type locality: America. 



Range: Washington to Canada and Carolina. 



Specimens examined: Mount Adams, Suksdorf, July 14, 1886; Henderson; Klickitat 

 River, Flett 1022; Ophir, Elmer 607; Almota, Piper, August 9, 18i96; Wawawai, Piper 

 1694. 



Zonal distribution: Upper Sonoran and Arid Transition. 



3. Convolvulus arvensis L. Sp. PI. 1: 153. 1753. 



Type locality: Europe. . 



Specimens examined: Ellensburg, Whited 525. A troublesome weed becoming wide- 

 spread. It has been noted at Pullman, Walla Walla, Garfield, and Edwall. 



CUSCUTACEAE. 



CUSCUTA. Dodder. 



Stigmas filiform; corolla scales crenulate. 



Calyx lobes not keeled; corolla lobes triangular, acute. . \ . C . epithymum. 



Calyx lobes keeled; corolla lobes ovate, obtuse 2. C. planiflora. 



Stigmas capitate ; corolla scales fringed. 

 Capsule pointed. 



Flowers subsessile; dry corolla not enveloping the 



capsule 3. C. sqitamigera. 



Flowers pedicelled; dry corqlla enveloping the cap- 

 sule 4. C. indecora. 



