PIPER FLORA OF THE STATE OF WASHINGTON. 453 



1. Apocynum androsaemif olium L. Sp. PI. 1: 213. 1753. 

 Type locality: "In Virginia, Canada." 



Range: British Columbia to Nova Scotia, south to Arizona and Georgia. 

 Specimens examined: Seattle, Pipe/- in 1897; Lake Chelan, Late cfc //uZ^ 550; Wenache, 

 Whited 1423. 

 Zonal distribution: Transition. 



la. Apocynum androsaemif olium. pumilum A. Gray, Syn. Fl. 2': 83. 1878. 



Type locality: "California to British Columbia." 



Specimens examined: Pullman, Piper 1620, 3508; Hull in 1892; Peshastin, Sandherg 

 & Leiberg 475; Falcon Valley, Sulcsdorf in 1886; Loon Lake, Winston, July 20, 1899; 

 Clarks Springs, Kreager 89; North Yakima, Mrs. Steinweg; without locality, Wilkes Expe- 

 dition 422; Clealum Lake, Cotton 858. 



Range: British Columbia and Idaho to California. 



Zonal distribl'tion: Arid Transition. 



lb. Apocynum androsaemifolium detonsum subsp. nov. 



Like the preceding, but the whole plant clothed with a short dense pubescence. Type 

 specimen collected in eastern Washington by G. R. Vasey (no. 429) in 1889. 



2. Apocynum ciliolatum sp. nov. 



Stems erect, very leafy, branched above, 60 to 70 cm. high, glabrous; leaves elliptic or 

 elliptic-lanceolate, puberulent on both sides, 4 to 7 cm. long, 2 to 3 cm. wide, nearly sessile; 

 panicle ample, rather loose, its branches erect, glabrous; bracts lanceolate, ciliate; pedicels 

 pubescent; calyx lobes deltoid, acute, erect, ciliolate, shorter than the corolla tube; corolla 

 pink, 5 mm. long, the erect lanceolate acutish ciliolate lobes as long as the tube, which is 

 nearly glabrous within. 



Collected at Wawawai, Washington, July 17, 1892, Lake & Hull, no. 549. 



A near ally of A. cannahinum L., but distinct from any described species in its ciliolate 

 calyx and corolla. 



3. Apocynum cannabinum L. Sp. PI. 1: 213. 1753. Indian hemp. '^ 

 Type locality: "In Canada, Virginia." "^ ' 

 Range: British Columbia to Nova Scotia south to Florida and California. 



Specimens examined: North Yakima, Wait, August, 1895: Peshastin, Sandherg d' Lei- 

 berg .591 ; without locality, Vasey in 1889. 



Zonal distribution: Arid Transition and Upper Sonoran. 



4. Apocynum suksdorfii Greene, Pittonia 5: 65. 1902. 



'I Apocynum cannabinum glaberrimum A. DC. Prod. 8: 439. 1844. 



Type locality: "vSandy banks of the Columbia River." Collected by Suksdorf. 



Range: Eastern Washington and Eastern Oregon. 



Specimens examined: Wenache, Whited; west Klickitat County, Svksdorf 1522; 

 Ophir, Elmer 507; Wawawai, Piper 1621 and August 24, 1894; Columbia Valley, Lyall in 

 1860; Waitsburg, 7/or7ier 3.35B. 



Zonal distribution: Arid Transition and Upper Sonoran. 



ASCLEPIADACEAE. 

 ASCLEPIAS. Milkweed. 



Leaves linear or lanceolf.,te, glabrous; follicles smooth. 2. A. mexicana. 



Leaves oval or oblong, white-tomentose ; follicles warty \. A. speciosa. 



1. Asclepias speciosa Torr. Ann. Lye. N. Y. 2: 218. 1823. 

 Type locality: "On the Canadian?" Collected by James. 

 Range: Washington to California and Arkansas. 



