POLYGONACEOUS GENERA. 19 
or short-cylindric; bracts ovate-lanceolate, caudately pointed : 
flowers at first white, changing in age to lilac-purple. 
In the mountains near Pagosa Peak, southern Colorado, at 
12,500 feet C. F. Baker, 28 Aug. 1899; distributed for Polygonum 
bistortoides; resembling B. linearifolia and with leaves quite as 
narrowly linear, but otherwise very different. 
B. CALOPHYLLA. About 2 feet high, the lowest leaves about 
10 inches long including the 3-inch petiole, all from a short 
stout contorted and fiber-bearing root: blades of leaves oblong 
and elliptical, flat even to the slightly wavy margin, glabrous 
throughout, very bright-green above, glaucous beneath, with 
broad flat striate midvein and obvious though delicate feather- 
veins: ocreæ 13 to 2 inches long, ending in a short scarious rim 
and a rather large oblong-lanceolate spreading leaf : spike ovoid 
to subcylindric, 1 to 2 inches long; lower bracts round-obovate 
and toothed, the upper narrower and acuminate: flowers milk- 
white, drying cream-color. 
Subalpine in the mountains of southern Colorado; Baker, 
Karle and Tracy’s 373 from 9,000 feet on Chicken Creek, and 
Bakers n. 293, from near Pagosa Peak at 10,500 feet are the 
types; the species noteworthy by its large handsome foliage, 
and recalling the far northwestern B. glastifolia which has a 
much firmer foliage reticulate-venulose, and underneath lepidote- 
puberulent. 
B. LITTORALIS. Allied to B. vivipara but large, nearly 2 feet 
high, the rather slender stem and long leaves from a thick hori- 
zontal bent rootstock: lowest leaves a foot long, the petioles 
rather longer than the linear or lance-linear blades, these subco- 
riaceous, abruptly acute at both ends, glabrous on both faces, 
very glaucous beneath, the midvein thick but rounded, not flat 
and striate: spikes 2 to 4 inches long, bulbilliferous only at and 
near the base: bracts subreniform-ovate, toothed across the 
broad summit and with a short subaristiform acumination. 
Shores of Yes Bay, Alaska, 20 July, 1895, Thomas Howell, 
n. 1048 in my set of his plants. The large very sharply out- 
lined coriaceous leaf-blades strongly recall the fronds of some 
simple-fronded ferns, both by outline and the venation. 
B. oPHIoGLossA. Stems several, very erect, 4 to 6 inches high 
