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44 FIELDIANA: BOTANY, VOLUME 28
7.5-9 mm. longis, 1.5 mm. latis, 2-floris, 1-carpis; squamis ovatis
vel oblongo-lanceolatis, breve mucronatis vel aristatis, pallide brunneis;
setis 6, antrorse hispidulis, fruccu longioribus, 5.5-6 mm.
longis; achaenio elliptico-ovato, 4 mm. longo, 2 mm. lato, manifeste
transversim profunde sulcato; tuberculo tenui quam achaenio longiore,
5.5-5.75 mm. longo, antrorse hispidulo; stylo parce vel non diviso.
Leaves mostly at base, 2-3 on culm, canaliculate above, midrib
prominent below, gradually passing into the glabrous, striatulate,
pale hyaline-margined sheath; inflorescence elongated, 13-18 cm.
long; peduncles erect, slender, the lowest more elongated; spikelets
with 4 scales; scales 3-8 mm. long, pale or ashy brown; achene
fulvous-brown, conspicuously transversely wrinkled with deep sulcations,
these connected by vertical striations; beak slender elongated,
with longer hairs at base and at apex of achene, dark brown
(Fig. 5, 1).
Type in herb. Chi. Nat. Hist. Mus., collected by fast water, bordering
forest of Rio Karuai, between Santa Teresita de Kavanayen and
base of Ptari-tepui^ state of Bohvar, alt. 1220 m. November
f 18,
1944, Julian A. Steyermark 60334.
Related to R. amazonica Poepp. & Kunth, from which it
may be
distinguished by the transversely wrinkled achene, more elongated
inflorescence, less foliose and less conspicuous bracts, taller, less
leafy glabrous culms, and glabrous leaves. From R. corymbosa (L.)
Hitchc. it differs in the color of the spikelets, different type of inflorescence,
and less leafy development of bracts and leaves. From
R. viridi-lutea C. B. Clarke of British Guiana it differs in the type of
inflorescence, color of spikelets, markings of achene, and width of
leaves. Finally, from R. trispicata Steud. it is distinguished by its
less branched inflorescence, more fasciculate heads of spikelets, and
different achene.
Khynchospora paramora Steyermark, sp. nov.
Perennis caespitosa; culmis foliatis glabris, 27-45 cm. altis, 1.5
mm. latis; foliis planis glabris culmo brevioribus, 12-20 cm. longis,
1.5-2.5 mm. latis; paniculis 3-4 subfasciculatis, 1-1.5 cm. longis,
0.5-1 cm. latis, axillaribus terminalibusque; pedunculis tenuibus,
2.5-4.5 cm. longis; bracteis 8-15 cm. longis, inferioribus foliaceis,
inflorescentiam excedentibus; spiculis anguste fusiformibus, 7.5-8
mm. longis, 1 mm. latis, 1-carpis; squamis ovatis vel lanceolatis,
breve vel manifeste aristatis, castaneis vel brunneis; setis nullis;
achaenio ovoideo, 2.1-2.5 mm. longo, 1.8 mm. lato, fere laevi subtilissime
puncticulato, pallide stramineo; tuberculo conic o-triangu-
1.1 mm. longo, superficie squamosa; stylo indiviso.
lari,
Cespitose perennial with thick, scaly, stoloniferous off-shoots;
culms striatulate; panicles dense; spikelets mostly 3-4 in a cluster,
with 5-6 scales; achenes buff to stramineous; tubercle about 1/2