429 
Rem.—Rudimentary leaves, nearly destitute of papillae, with 
leaf-cells linear-rhomboidal and costa vanishing in the middle, are 
not infrequent on stolons and flagellae. 
2. CLAOPODIUM LEUCONEURUM (S. & L.) R. & C. 
Thuidium leuconeurum S. & L. in Sulliv. Icon. Muse. Supp. 104. 
1874. 
Lypnum leuconeurum 1. & J. Mosses of N. A. 328. 1884. 
Claopodium leuconeurum Ren. & Card. Musc. Am. Sept. 50. 
1892, 
In compact spreading tufts, yellow-green; stems 2-3 cm. 
long; leaves of terminal branches appressed when dry, erect- 
Spreading when moist, lanceolate, not two-ranked; inner periche- 
tial bracts scarcely costate ; pedicel minutely roughened (smooth ?) ; 
capsule small, oval; operculum long conic; in other respects as in 
Claopodium Whippleanum, of which it appears to be a depauperate 
form, growing in drier situations; matures in early spring. 
On the ground and base of trees. California (Bigelow, Bolan- 
der, Howe). 
Type locality California. Type in Coll. Sullivant, Gray Her- 
barium. 
ItLust.—Sulliv. Pacif. R. R. Report, 4: p/. 9, in part (1856); 
Sulliv, Icon. Musc. Supp. f/. 80 (1874). 
Exsic.—S. & L. Muse. Bor- Am., 2 ed. No. 407°. 
Rem.—A careful study of considerable material, including Nos. 
407 and 407° of S. & L. Musc. Bor. Am., and also the types of 
C. Whippleanum and C. leuconeurum, kindly loaned me by Dr. B. L. 
Robinson, from the Sullivant Collection in the Gray Herbarium, 
shows but little ground for their separation. In the notes which 
accompany the types Sullivant admits that “they are very simi- 
lar,” “they grow mixed together,” “ Hypnum Whippleanum may 
have an annulus,” and that “it is difficult to distinguish them 
without the fruit.” The character on which he puts most stress 
is, as he claims, the rough pedicel of the former and the smooth 
Pedicel of the latter, I have been unable to verify the correctness 
of this observation, as I find the pedicels in both more or less 
roughened, simply a difference in:degree; in the types this differ- 
€nce is inappreciable. 
Sullivant also claims that the leaves in C. euconeurum are not 
