PHILIPPINE PLANTS, IX. 
313 
Perianth-tube cylindric, about 1.5 mm in diameter, inside gla- 
brous, outside gray-puberulent, the lobes 5, elliptic, spreading, 
2.5 to 3 mm long, rounded, imbricate, densely gray-pubescent on 
the inner surface. Stamens 10, alternate in two series, inserted 
just at the apex of the perianth-tube but included, the anthers 
oblong, about 1 mm long ; filaments of the upper row about 1 mm 
long, those of the lower row shorter. Ovary sessile, densely 
villous, oblong-ovoid, about 3 mm long, 1-celled, narrowed above ; 
style slender, glabrous, about 1.5 mm long; stigma obovoid, pap- 
illose, about 0.5 mm long. Fruit unknown. 
Luzon, Province of Lagnna, Calauan, Bur. Set. 12360 McGregor, Decem- 
ber 12, 1910, a vine in hill-side forests. 
The genus here proposed is dedicated to Mr. R. C. McGregor of the 
Bureau of Science by -whom it was collected, and who has made extensive 
botanical collections in the Philippines and in Guam during the past eight 
years. 
Maegregorianthus is manifestly allied to Wikstroemia Endl., differing 
especially in its 5-merous flowers, as well as in its habit. All known species 
of Wikstroemia have a 4-parted perianth, and 8 stamens. Mr. McGregor 
notes that the plant is a vine which is presumably correct, although this 
is a most unusual character in the Thymelaeaceae. The cartilaginous leaf- 
margin, with which the lateral nerves anastomose direct, is a striking 
character of the proposed genus. 
GYRINOPSIS Decne. 
GYRINOPSIS BRACHYANTHA sp. nov. 
Arbor parva, glabra ; f oliis chartaceis vel subcoriaceis, nitidis, 
oblongis, usque ad 16 cm longis, acuminatis, basi acutis vel 
obtusis; floribus axillaribus, solitariis vel fasciculatis, 4 mm 
longis, perianthio campanulato, capsulis anguste obovoideis, levi- 
ter compressis, 1.2 ad 1.5 cm longis. 
A small tree, or according to Ramos a shrub 2 m high, glabrous, 
the branches slender, terete, brownish when dry, the growing 
tips usually pubescent. Leaves oblong, chartaceous or subcor- 
iaceous, oblong, 8 to 16 cm long, 2 to 4.5 cm wide, shining on both 
surfaces, the base acute or obtuse, the apex acuminate, margins 
recurved; midrib very prominent, the nerves exceedingly nu- 
merous, spreading, parallel, very dense, slender; petioles about 
5 mm long. Flowers greenish, axillary, solitary or several in a 
fascicle on a short axis, the pedicels about 3 mm long. Perianth 
campanulate, 4 mm long, in bud distinctly pubescent externally, 
becoming nearly glabrous, the lobes 5, oblong, or ovate-oblong, 
pubescent internally, as long as the perianth-tube. Stamens 10, 
five opposite the perianth-lobes, their anthers about 0.7 mm long. 
