358 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



Chenowith, Stfl-s<ior/"2568; without locality , Fascy 264 ; Blue Mountains, ffoni^r 277; Piper 

 2329; Wenachc Mountains, Cotton 1301; Hell Roaring River, Cotton 1519; AVenaohe, 

 Whiied 96, 41, 3, 104, and June 28, 1896; near VVenache, Whiled 120; Wenache, Whited 1105. 

 Zonal distribution: Arid Transition. 



28a. Liupinus laxiflonis, forma theiochrous Robinson, forma nov. 

 Corolla sulphur-yellow. , 



Specimens examined: Near top of ridge, northern slope of Rattlesnake Mountains, 



Yakima County, Washington, J. S. Cotton, July 16, 1900. 



LUPINUS HOI>OSERICEUS Nutt, LuPINUS AROENTEUS Pursh, LuPINUS PARVIFLORUS Nutt. 



The,se three names are included in Suksdorf's list, but we have been unable to lind good 

 evidence that the species occur in the State. 



XJLEX. 



1. TJlex europaeus L. Sp. PI. 2: 741. 1753. Gorse. Furze. 



Type uhalit^-: " Habitat in Anglia, Gallia, Brabantia." 



This plant is well established on AIki Point near Seattle, and has also l)een reported from 

 other localities. 



MELILOTUS. 



Flowers white 1 . M. alhus. 



Flowers yellow 2. M. officinalin. 



1. Melilotua albus Desr. in Lanj. Kncye. 4: &J. 1797. Sweet clover. 

 Type ix)cality: Siberia. 



Specimens e.xamined: North Yakima, Wait, August, 1895; Egbert Springs, Sandberg d: 

 Leiberg 398. 



2. Melilotua officinalis (L.) Lam. Fl. Fr. 2: 594. 1778. Yellow melilot. 

 Trifolium melilotus ojiciiialis L. Sp. PI. 2: 765. 1753. 



Type ixkjality: Europe. 



Specimens examined: Okanogan, Criffiths cfc Cotton 345. 



TRIFOLIUM. Ci-«)VER. 



Leaflets 5 to 7 ; flowers large, 2 to 3 em. long T . \. T. maxTocephalum. 



Leafleto3; flowers smaller. 



Heads not subtended by an involucre. 



Perennials; with thick roots or creeping rootstocks. 

 Heads on axillary peduncles; introduced. 



Flowers white; stems creeping 10. T. repens. 



Flowers pink ; stems procumbent 11. T. hyhridum. 



Heads on terminal peduncles; native. 



Leaves glabrous; corolla red 2. T. douglasii. 



Leaves pubescent. 



Calyx-teeth plumose. 



Heads ovoid, becoming oblong 3. T. plumosum. 



Heads globose. 



Lobes of the calyx subequal, 3 to 4 



times as long as the tube 4.7'. eriocephalum. 



Lobes of the calyx unequal, the 

 anterior twice as long as the calyx 

 tube and the other lolies 5. T. arcuatum. 



