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4 FIELDIANA: BOTANY, VOLUME 28
MUSCI 2
Campy lopus (Eucampylopus) bolivarensis Bartr., sp. nov.
Robustus, laxe caespitosus, caespites nigricantes, superne lutescentes,
nitidi. Caulis submersus, 6-10 cm. longus, simplex vel parce
ramosus. Folia rigida, erecto-patentis, sicca immutata, 7-8 mm.
longa, anguste ovato-lanceolata, tubuloso-concava, sensim setaceoacuminata,
saepe in pilum hyalinum parce denticulatum producta;
costa excurrente; cellulae basilares angusce rectangulares, incrassacae,
arete porosae, marginales angustiores, alares nuraerosae, fuscescentes,
cellulae superiores lineares. Caetera ignota.
Type in herb. Bartram, isotype in herb. Chi. Nat. Hist. Mus., collected
on summit of Mount Roraima, on southern half of the summit
between Summit Camp, Great Central Rift, Central Swamp, and pond
at southern end, state of Bolivar, alt. 2700-2740 m., September 28,
1944, Julian A. Steyermark 58895; same locality, Steyermark 58915.
The submerged habit is a very unusual one for Campylopus, and
the species appears to be sharply distinct. The strongly porose
basal areolation and the linear upper leaf cells are characters in
common shared by no other species of the Eucampylopus group that
I am familiar with.
Didymodon angustifolius Bartr.,
sp. nov.
Caespites densi, inferne fusci, superne virides, ad 1 cm. alti.
Folia humida late patentia, flexuosa, sicca arete circinato-contorta,
3-4.5 cm. longa, e basi erecta, breviter oblonga, concava angustissime
lineari-ligulata, subulato-acuminata; margines plani, integri;
costa breviter excurrente; cellulae superiores rotundatae, incrassatae,
diam. circa 8 m. papillosae, margines versus 2-3 stratosae,
basilares rectangulares, tenerae, hyalinae. Caetera ignota.
Type in herb. Bartram, isotype in herb. Chi. Nat. Hist. Mus., collected
on north-facing slopes above La Trinidad in cloud forest zone,
southwest of Cocollar, Cerro Turumiquire, state of Sucre, alt. 2100-
2200 m., May 5, 1945, Julian A. Steyermark 62544. MONAGAS:
Guacharo Cave, 6 kms. northwest of Gua'charo, alt. 950 m., Steyermark
62293a. ANZOA'TEGUI: cloud forest of fila Grande, ^headwaters
of Quebrada La Tigra, Cerro San Jose', between Bergantm and
Cerro Peonia (Cerro Los Pajaritos), alt. 1800-1850 m., Steyermark
61550a.
Without fruit the generic position of this species must remain uncertain.
The long, exceedingly narrow, plane margined leaves with
the upper cells in two or three layers toward the margins, together
with the thin-walled rectangular cells of the leaf base is an unusual
combination of characters comparable to no other species familiar to
me. As the costa in cross section shows stereid bands on both
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By E. B. Bartram