358 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



Chenowitb, Sul-fi(]oif256S; without locality, T'a.se;/ 264: Blue Mountains, //o/7it7' 277; Piper 

 2329; Wenache Mountains, Cotton 1301; Hell Roaring River, Cotton 1519: Wenache, 

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

 Zonal distribl-tiox: Arid Transition. 



28a. Lupinus laxiflorus, forma theiochrous Robinson, forma nov. 



C'orol la sulpl i u r-yelio\v . 



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

 Yakima County, W^ashington, ./. S. Cotton, July 16, 1900. 



Lupinus holosericeus X^itt, Lupinus argenteus Pursh, Lupinus parviflokus Xutt. 

 These three names are included in Suksdorfs list, but we have been unable to lind good 

 evidence that the species occur in the State. 



ULEX. 



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



Type locality: "Habitat in Anglia, Gallia, Brabantia." 



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

 other localities. 



MELILOTUS. 



Flowers white 1 . M. alhus. 



Flowers yellow 2. M . officinalis. 



1. Melilotus albus Desr. in Lam. Encyc. 4: 63. 1797. Sweet clover. 

 Type locality: Siberia. 



Specimens e.xamined: North Yakima, M'ott, August, 1895; Egbert Springs, Sandherg & 

 Leibcrg 398. 



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

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



Type locality: Flurope. 



Specimens exa.mined: Okanogan, Griffiths d' Cotton 345. 



TRIFOLIUM. Clover. 



Leaflets 5 to 7 ; flowers large, 2 to 3 cm. long 1. T. inacrocephalum.. 



Leaflets 3; flowers smaller. 



Heads not subtended by an involucre. 



Perennials; with thick roots or creeping root stocks. 

 Heads on a.xillary peduncles; introduced. 



Flowers white; stems creeping 10. T. repens. 



Flowers pink ; stems procumbent 1 1 . 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. T. eriocephahtm. 



Lobes of the calyx unequal, the 

 anterior twice as long as the calyx 

 tube and the other lobes 5. T. arcuatum. 



