38 MARCHANTIACEAE 
Expedition, Aug. 6, 1891, no. 1511); also, by the same collectors, 
“near White Chief Mine ” (no. 1528). 
1b. Clevea hyalina Californica var. nov. 
Santeria linbata * Aust. р. р. Proc. Acad. Nat. Sci. Philad. 
1869:229. 1869. 
Thallus often once dichotomous, with strongly pronounced 
radial ridges or undulations on the ventral surface toward the thin 
margin, very distinctly areolate, pores in the median parts large 
and elliptical, often 50-150/ in length, the radial walls of the 
bounding cells unthickened, the pores near the margin smaller, 
with the radial walls of the surrounding cells more or less clearly 
incrassate, scales purple or slightly decolorate at their extremities, 
exceeding the margin : peduncle delicate, slender, 2 5-32 mm. high, 
with few and rather inconspicuous paleae at the apex ; involucres 
for the most part strongly discrete : capsule finally subexserted, the 
pedicel attaining a length of 2 mm. 
Doolan's Creek Cañon, near Ukiah, May 13, 1896 (Howe, no. 
765); a specimen collected by A. J. McClatchie on the trail to 
Wilson’s Peak, San Gabriel Mts., April, 1893, has more in com- 
mon with this variety than with the typical form, though the pedun- 
cles are shorter, the capsules sometimes subsessile, the areolation 
is less distinct, and the guard-cells of the stomata have more 
strongly thickened radial walls. Professor McClatchie’s plant 
differs, too, from both the Ukiah specimen and the typical С. Aya- 
lina іп the very slender inconspicuous scales with almost filiform 
points. 
The Ukiah plant is a remarkable one, and it is with misgivings 
that we refer it to Clevea hyalina as a mere variety, but the Wil- 
son’s Peak specimen, though somewhat aberrant in scale-characters, 
bridges over the gap in respect to the stomata and in some other 
particulars, as noted above. The form possibly needs comparison 
with Clevea pedicellata (Plagiochasma pedicellatus Griff, Not. ad РІ. 5 
Asiat. 2:331. pl. 68. f. 2. 1849) from Afghanistan, though the | 
latter would appear from figure and description to differ at least in — 
8- or 9- instead of 4- or 5-valved capsule. 
Mr. Austin, who published « Plagiochasma erythrosperma” from 
a plant thus labeled (with, however, a query-mark after the “n. ѕр.”), 
ж ha nails Up. 0 I ہس ر‎ 
Md For remarks on the use of the name limbata, see footnote under Astere//a Сай- 
ornica. 
