206 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
Heuchera chlorantha sp. nov. 
Tufted from a stout branching caudex; leaves all basal, the blades 5 to 8 
cm. broad, orbicular to reniform, deeply cordate, 7 to 9-lobed, the lobes broadly 
rounded or faintly lobed and dentate with broad cuspidate teeth, glabrous ex- 
cept on the veins beneath; petioles 5 to 15 cm. long, with spreading or some 
what retrorse, usually brownish hairs; flowering stems scapiform, 50 to 100 
em. high, villous, with spreading or somewhat retrose brownish hairs, and 
usually bearing one or two fimbriate leaf rudiments; inflorescence a narrow 
dense panicle 5 to 10 cm. long, the short branches 8 to 7-flowered the axis hir- 
sute and glandular; bracts ovate to lanceolate, the lower 3-cleft, fimbriate; 
calyx greenish, turbinate-campanulate, the lobes oblong, obtusish. the whole 
pruinose-puberulent, 7 to 8 mm., or in fruit 10 to 12 mm. long; petals minute or 
lacking. 
Type in the U. 8. National Herbarium, no, 690786, collected in Falcon Valley, 
Klickitat County, Washington, June 28, 1892, by, W. N. Suksdorf (no. 17389). 
This species differs from all others in the group by its leaves being mem- 
branaceous instead of subcoriaceous and from all except H. tenuifolia in its 
greenish flowers, the remainder having cream-colored flowers. 
The following additional specimens have been examined: 
WASHINGTON: Sumas Prairie, 1858, Lyall; Kitsap County, July, 1895, 
Piper; Seattle, Piper 2515; Tacoma, Flett 123; Montesano, Heller 4067; 
Falcon Valley, Suksdorf 1739 (type); Vancouver, Piper 4944; Upper 
Columbia, Wilkes Exped. 461 (this locality probably wrong, as many 
of the labels on Wilkes Expedition plants are undoubtedly misplaced). 
OREGON : Cascade Mountains, Cusick 2675; Cascade Mountains, latitude 44°, 
Newberry; Farewell Bend, Crook County, Leiberg 481; Elk Creek, 
Jackson County, Applegate 25738; Lake of Woods, Klamath County, 
Coville & Applegate; Western Oregon, June, 1880, Howell 137; Silver 
Creek, Hall 161. 
BriTisH CoLuMBIA: Skidegate. Graham Island, Queen Charlotte Island, 
Osgood in 1890. 
Heuchera cylindrica Dougl. (H. columbiana Rydb.) belongs to an exceedingly 
puzzling group of the genus. Rydberg, in the North American Flora, recognizes 
six species, mainly on the basis of leaf contour and pubescence. The characters 
assigned to the various species do not separate herbarium material into 
homogeneous units, and additional forms would require names if the scheme 
used were carried out fully. It would seem preferable to consider Heuchera 
cylindrica a polymorphous species with several intergrading subspecies. Typical 
examples of Heuchera cylindrica Dougl. are the following: 
WASHINGTON: Loon Lake, July 20, 1897, Winston; Clark Springs, Kreager 
71; Wenache Mountains, Whited 1134; Clark Springs, Beattie &€ Chap- 
man 2019. 
IpaHo: Near Lewiston, Sandberg, Heller & McDougal 161. 
Just how the confusion as regards the identity of Heuchera cylindrica arose 
is difficult to say. In the Gray Herbarium is a specimen marked “ Ex Hooker,” 
which is not the true H. cylindrica, but the plant to which all Amerkcan 
botanists have applied the name. Lindley* published a colored plate of 
Heuchera cylindrica from specimens grown in the garden of the London Horti- 
cultural Society, also stating that Douglas collected it ‘‘in dry mountain woods 
near the Kettle Falls.” This plate evidently represents true Heuchera cylin- 
drica, but modified by the conditions under which it was grown, so that it 
might easily be mistaken for the species here named Heuchera chlorantha. 
* Edwards’s Bot. Reg. 23: pl. 1924. 1887. 
