Boundary Commission, 1858, Dr. Lyall (('•); prairie, Tarom.i, April 1, 1806, 

 J. B. Fletl 79 (VVSC); Washington Territory, Dr. Cooper (d). (In C"ooi)er's 

 report, Pac. R. R. Repts. 12: pt. 2, 65. 1860, he states that he found this 

 species at Straits de Fuca, and at Steilacoom. It is still known at the latter 

 place, but has not been recollected at the Straits.) 



/ C. multicaule Hook., Fl. Bor. Am. 1: S.^5. Tab. (Will. 

 1834. This original species follows the Columbia River from 

 Vancou\er up at least as far as Kennewick, up the Tmatilla 

 River to the foothills of the Blue Mts., up the Walla Walla 

 River to Touchet, up the Touchet River to Waitshurg, uj) the 

 Yakima Ri\er and its tributaries as far as ("owiche, and ten 

 miles be\'ond Kllensburg. It is found at Baker ('it\' and in 

 southern Oregon, and from a half dozen stations in central anrl 

 northern California. The \arious collections from southern 

 Vancou\er Island and from Puget Sound are here separated as 

 a distinct species. This destroys one of those interesting cases 

 of Arid Transition plants reported to occur on the sandy prairies 

 in western Washington, with the great barrier of the Cascade 

 Mts. and the humid e\'ergreen forest lying between. Vet, it 

 leaves each of the species with a natural distribution. The 

 original species, Crocidium multicaitle can be recognized b>' its 

 ray flowers with scaberulous pappus bristles equaling the corolla 

 tube and early deciduous, the disc flowers with similar pappus 

 scarcely exceeding the tube, the tube short and cylindrical, 

 but distended at base when dried, 0.4 mm. wide, 1-1 .6 mm. long, 

 the campanulate limb 1.4-1.6 mm. long with reflexed lobes, and 

 the stamens and stigmas well exserted from the throat. The 

 writer is quite aware that Hooker originally described this 

 genus and species as having the ray achenes naked, ''radii 

 nuda" on page 335, and so illustrated them, (Fl. Bor. Am. 1 : 

 tab. CXVIII, fig. 6. 1834); and that this treatment has been 

 followed and maintained by A. P. de Candolle, Gray, Bentham 

 & Hooker, Engler & Prantl, Howell, Piper & Beattie, Rydberg, 

 and Jepson. Through the courtesy of Dr. B. L. Robinson it 

 has been possible to borrow and study the material of this 

 genus in the Gray Herbarium. This includes one collection of 

 three small plants labeled Crocidium multicaule, PI. Bor. Am., 

 Hooker misit, Januar. 1835; and another of one medium sized 

 plant labeled Crocidium multicaule Hook., Oregon (Hooker!). 

 These are old, fragile, and somewhat damaged by insects, but 

 they clearly are of the species so common on the Columbia 

 River, and with the characters listed above. They are unques- 

 tionably portions of the type collection. Furthermore, though 

 Douglas ascended the Chehalis River and portaged to the Cow- 

 litz, he did not on his first trip to the Pacific Northwest reach 

 Puget Sound, or Vancouver Island, where C. pugetense is now 

 known to occur. The new C. pugetense may be distinguished 

 by its ray flowers destitute of pappus, the disc flowers with 



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