BRITTON: STUDIES OF WEST INDIAN PLANTS—XII 7 
pairs of a the first pair from near the base, the second pair 
rom a short distance above, the third pair from below the 
middle, ee transverse venation widely spreading. Inflorescence 
s 
the panicle-branches filiform; flowers 2 or 3 together, sessile, 
subtended by subfoliaceous bractlets; calyx subcampanulate 
with 4 iibeeic teeth. 
Necramium gigantophyllum Britton, sp. nov. 
Stems slender, simple or few-branched, quadrangular, 2 m. 
high or higher, densely scurfy-puberulent above. Leaves oblong 
to oblong- oblanceolate, 2-4 dm. long, 12 cm. wide or less, entire, 
green on both sides, but paler beneath than ag agen 
above, scurfy- puberulent on the veins beneath, the x acu- 
minate, the base narrowed, the stout scurfy eoroles gar cm. 
long; panicles densely pubescent, several-flowered, about 4 cm. 
long; bractlets Sion: lanceolate, concave, acute, pubescent, 3 
m. long; calyx-tube 2 mm. eee its teeth 1 mm. long; petals 
and stamens unknown. 
Forests at high altitudes, northern mountain range; TYPE 
from Heights of Aripo (Trinidad Herbarium 9798, collected by 
Broadway, January 10-26, 1922); Mount Tocuche (Brttion, 
Hazen & Mendelson 1334), April 3-5, 1920. 
72. THE GENUS DORSTENIA IN THE WEST INDIES 
Leaves large, deeply lobed or undulate; receptacle quad- 
rate. 1. D, Contrajerva. 
Leaves small, dentate, crenate or entire; receptacle 
suborbicular, discoid or cyathiform. 
Leaves not peltate 
Leaves orbicular, deeply cordate 
Leaves crenate; receptacle cyathiform. 2. D. crenulata. 
Leaves entire or obsoletely 2 ae 
Receptacle pubescent, cece ad 3. D. tuberosa. 
1 I d 4. D. Rocana. 
Leaves ovate to oblong or r elliptic. 
Leaves ovate, deeply cordate. 5. D. cordifolia. 
Leaves —— to elliptic, cordate or subcordate, 
crenulat 6. D. tubicina. 
Leaves peltate 
Leaves ravebldns. peltate very near the base 7. D. petraea. 
Leaves ovate to paced peltate at the middle 
or somewhat belo 
Leaves orbicular, ‘pubescent on both sides 8. D. peltata. 
Leaves to ovate, more or ‘alae longer 
than broad. 
