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BOTANICAL EXPLORATION IN VENEZUELA - I 165<br />
base, rest of petals white; bracts pale green; leaves grass dull green<br />
above, gray green below with dull dark green lines"; forest along<br />
Base River (Cano Negro), at southeastern base of Cerro Duida, alt.<br />
225 m., August 23, 1944, Steyermark 57927, "herb in dense clump,<br />
3 feet tall; leaves gray green below, deep green above; bracts brickcolored<br />
above; flowers white with rose-salmon"; San Carlos, Rio<br />
Negro, Territorio Federal Amazonas, alt. 100 m., 1942, Lletvelyn<br />
Williams 14243.<br />
This species is characterized by the combination of the short,<br />
dense inflorescence, strigillose bracts, relatively short sepals and<br />
corolla parts, densely puberulent upper portion of the petioles, and<br />
minutely puberulent midrib of the upper leaf surface.<br />
It is related to M. laxum (P. & E.) Schum. and M. exannulatum<br />
Schum., from which it differs in the shorter sepals, abbreviated,<br />
shorter inflorescence, strigillose bracts, finely puberulous upper<br />
portion of the petiole, and puberulous midrib of the upper leaf surface.<br />
Williams 14243 has the leaf surface and petioles more pubescent<br />
than the other two collections cited, but is apparently the<br />
same in all other respects<br />
ḂURMANNIACEAE<br />
Burmannia sanariapoana Steyermark, sp. nov.<br />
Caules erectes simplices vel ramosi, 11-23 cm. alti, inferne foliolosi,<br />
superne parce bracteosi; foliis 5-6, infimis ovato-lanceolatis,<br />
3-5 mm. longis, caulinis lineari-lanceolatis vel lanceolatis, subulatis<br />
squamiformibus, caulem vaginantibus, 5-12 mm. longis, 0.5-1*5 mm.<br />
latis, prominenter uninerviis; bracteis caulinis adpressis remotis<br />
oblongo-lanceolatis, acutis, 3-5 mm. longis; floribus in racema<br />
capituliformi vel in cyma dichotoma secundis subsessilibus bracteatis;<br />
bracteis elliptic o-oblongis, 1 mm. longis, 0.5 mm. latis; ovario<br />
1.3 mm. longo; perianthio obconico triquetro purpureo, apice pallidiori<br />
et viridi, superne alato, tubo triangulari 2-3.5 mm. longo, lobis<br />
exterioribus ovatis 1-1.3 mm. longis erectis alatis vel cristatis,<br />
supra marginibus inflexis apice cucullatis, lobis interioribus linearispatulatis<br />
vel anguste oblongo-linearibus, rotundatis, 4 mm. longis;<br />
staminibus sessilibus, infra bases loborum interiorum insertis,<br />
connective ellipsoideo, 2 cristis apicalibus sublanceolatis; antheris<br />
reniformibus; stylo cylindrico-filiformi; stigmatibus divaricatis infundibuliformibus<br />
cristatis (Fig. 24).<br />
Type in herb. Chi. Nat. Hist. Mus., collected in vicinity of Sanariapo,<br />
near Rio Sanariapo, tributary of Orinoco river, Territorio Federal<br />
Amazonas, alt. 100 m., September 8, 1944, Julian A. Steyermark<br />
58466, "flowers purple with paler lavender and greenish at tip".<br />
This species is related to B. dasyantha Mart, of Brazil, but has<br />
smaller flowers and shorter and more scale-like leaves than that