PIPER FLORA OF THE STATE OF WASHINGTON, 431 



HYDROCOTYLE. 



1. Hydrocotyle ranunculoides L. f. vSuppl. 177. 1781. 



Type locality: "Mexico." 



Range: Eastern Pennsylvania to Florida, thence westward to Texas, California, and 

 Washington. 



Specimens examined: Seattle, Piper 639; Taeoina, Fleit 225; O'Briens, King County, 

 Piper. 



Zonal uistribltion: Humid Transition. 



CORNACEAE. Dogwood Fa^iily. 



Flowers perfect in cymes, either loose or head-like Cornus. 



Flowers dioecious, in spikes - Garrya. 



CORNUS. 



Flowers in loose cymes, not involucrate; fruit white or blue. 



Cyme branches hairy; leaves loosely pubescent beneath 1. C. oeeideniahs. 



Cyme branches glabrous; leaves appres.sed-pubescent beneath 2. C. stolonifera. 



Flowers in head-like cymes, surrounded by a conspicuous involucre; fruit 

 red. 



Tree, 10 to 20 m. high: bracts 4 to 8 cm. long 3. C. nuiiallii. 



Herbaceous, 8 to 20 cm. high; bracts 1 to 2 cm. long : . . . 4. C. canadensis, 



1. Cornus occidentalis (Torr. et Gr.) Coville, Contr. Nat. llerl). 4: 117. 1S93. 

 Cornus pubescens Nutt. Sylva. 3: 54. 1849. 



Cornus sericea f occidentalis Torr. & Gr. Fl. 1 : 052. 1840. 



Type locality: "N. W. coast, Douglas, Air. Tolmie! Dr. Scolder! " 



Range: British Columbia to north California, east to Idaho. 



Specimens examined: Montesfino, Heller 3S57 ; \Yhu\hy Is\a.nd, Gardner 139 \ Seattle, 

 Piper 262, July 10, 1895, July 4, 1897; Silverton, Bouck 91; Cascade Mountains, latitude 

 49°, Lyall in 1859; Spokane, Piper 2692: Clarks Springs, Kreager 50, 571 : Clallam County, 

 S/mer 2699; Valley, Beattie & Chapman 21.56. 



Zonal distribution: Transition. 



Cornus drummondii Meyer, as recorded in Cooper's Report, is doubtless the aljove 

 species. 



2. Cornus stolonifera Michx. Fl. 1:92. 1803. Red osier. 

 Type locality; "Hab. ad ripas amniumquc rivorumque Canadae et \ovae Angliae." 

 Range: New Brunswick to Alaska, south to Virginia, and in the mountains to Califor- 

 nia and New Mexico. 



Specimens examined: Wenache, Wldted 205, 1135; Ellensbuig, Piper, May 20, 1897; 

 Tampico, Henderson, July 31, 1892; Mabton, Cotton 368; west Klickitat County, Sulcs- 

 dorf; Coulee City, Lake <& Hull, August 8, 1892; New London, Lamb 1169; Sprague, 

 Sandberg & Leiberg 151 ; Spokane, Henderson, June 12, 1892; Lake Chelan, Lake cfe Hull, 

 August 25,- 1892 ; ^N^^i\\il^\&\\•^i, Mrs. L. P. Anderson; Pullman, EZwer 840; Pi>f/' 2648; 

 Wawawai, Piper, June 9, 1894; Lake & Hull 440; Blue Mountains, Piper, August 2, 1896; 

 Piper, July 15, 1896; without locality, Vasey in 1889. 



Zonal distribution: Arid Transition and Upper Sonoran. 



Cornus baileyi Coult. & Evans has twice been reported from Washington. In each case 

 the specimens are, in our opinion, really C. stolonifera. 



3. Cornus nuttallii Audubon; Torr. & Gr. Fl. 1:652. 1840. Dogwood. 

 Type locality: Oregon. 



Range; Briti-sh Columbia to California, west of the Ca.scade Mountains, and in nortli 

 Idaho. 



