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126 FIELDIANA: BOTANY, VOLUME 28
lucent, glabrous throughout, not bearded, not glanduliferous; petals
3, separate, elliptic-sublanceolate, hyaline, about 1.2 mm. long and
0.3 mm. wide, subacute, glabrous throughout, not glanduliferous;
ovary 3-celled, oblong-elliptic, about 0.7 mm. long and 0.4 mm. wide,
glabrous, 3-ovulate; style stout, about 0.4 mm. long, glabrous; stigmas
3; style -appendages 3, issuing from the same level as the
stigmas.
Type in herb. New York Botanical Garden, collected in sandy wet
ground with Stegolepis and Brocchinia on large mesa, Gran Sabana,
between Mission of Santa Teresita de Kavanayen northwest of Rio
Karuai, state of Bolivar, alt. 1220 m., October 26, 1944, Julian A.
Steyermark 59369. The species is apparently closely related to P.
cristatus Moldenke, which differs in its blunt brunneous involucral
bractlets, larger receptacular bractlets which are long-villous over
the entire back, larger cuneate sepals in the staminate florets,
smaller and bearded sepals and bearded petals in the pistillate
florets, the glabrescent leaves and peduncles, and other characters.
Rondonanthus micrope talus Moldenke, sp. nov.
Herba dense caespitosa; caulibus valde abbreviatis dense villosis;
foliis numerosis firmis rectis vel patentibus lanceolatis 2-4 cm.
longis, 2-4 mm. latis, acutis vel attenuatis, in statu juventute
utrinque sparse longeque pilosis, dein glabrescentibus, obscure
multistriatis non fenestratis nkidis, ad basin dense villosis; vaginis
cylindricis, ad basin inflatis, ad apicem arete adpressis, ca. 1.4 cm.
longis, multistriatis non tortis glabris, ad apicem cilia tis; pedunculis
paucis abbreviatis 2-3 cm. longis non tortis sulcatis obscure puberulis
nitidis, ad apicem ampliatis.
Densely tufted herbs; stems much abbreviated, densely villous,
hidden by the leaves; leaves numerous, in dense rosettes, rather
firm, erect or spreading, lanceolate, 2-4 cm. long, 2-4 mm. wide at
the mid-point, acute or attenuate at the apex, sparsely long-pilose
on both surfaces when young, glabrescent in age, rather obscurely
many-stria te, not fenestrate, shiny, ampliate and clasping the stem
at the base and usually densely villous there; sheath cylindric,
somewhat inflated toward the base, closely appressed to the peduncle
at the apex, about 1.4 cm. long, many-striate, not twisted, glabrous
except for the apex, obliquely split at the apex, the blade lanceolate,
about 5 mm. long, erect, appressed to the peduncle, acute, cilia teraargined;
peduncles few, all abbreviated, 2-3 cm. long, not twisted,
several-sulcate, very obscurely puberulent in the s ideations, otherwise
glabrous, shiny, brownish, ampliate at die apex; heads hemispheric,
3-9 cm. in diameter, white; plants apparently dioecious,
only staminate florets seen; involucral bractlets broadly ovate,
blackish, closely imbricate, about 2.3 mm. long and 3 mm. wide, more
or less acuminate at the apex, glabrous and shiny except for the
more or less ciliate margins toward the apex; receptacle longvillous;
receptacular bractlets oblong-elliptic, blackish toward the