OENOTHERACEAE 355 
Species about 20, mostly in North America, 2 widely distributed in 
the tropics of the Old World, both in the Philippines. 
Pods stout, 6 to 8 mm long, about 2.5 mm thick, seeds not showing through 
|) ER te ETE EE le 1. L. parviflora 
Pods slender, 1 to 1.5 em long, 1 to 1.5 mm thick, 4-angled, seeds distinctly 
showing through the capsule walls.............2..22..2.22.......-..---. 2. L. prostrata 
1. L. PARVIFLORA Roxb. 
An erect, branched, glabrous, annual herb 10 to 30 cm high or more, 
stems often purplish, terete. Leaves lanceolate, acute, 2 to 6 cm long, 
base narrowed. Flowers axillary, solitary, 4-merous, shortly pedicelled. 
Calyx-lobes oblong, acuminate, green, reflexed, about 2 mm long. Petals 
yellow, oblong-elliptic, 3 mm long, spreading. Capsules oblong, subcylin- 
dric, with 4 rounded angles, green or purplish, 6 to 8 mm long, the seeds 
in several rows in each cell, not distinguishable through the cell-walls. 
In open wet grass lands and waste places, fl. Oct.-Feb., and probably 
in other months; widely distributed in the Philippines, probably introduced. 
India, through Malaya to northern Australia. 
2. L. PROSTRATA Roxb. 
An erect or ascending, branched, glabrous, annual herb with angled 
stems 20 to 60 em high. Leaves oblong-lanceolate to lanceolate, narrowed 
at both ends, acuminate, the larger ones 6 to 8 cm long, few or many 
smaller ones intermixed. Flowers small, 4-merous, axillary, solitary, sessile, 
the calyx-lobes and petals about 2 mm long. Capsules linear, 4-angled, 
slender, 1 to 1.5 cm long, 1 to 1.5 mm thick, the seeds in one row in each 
cell, distinctly showing through the cell walls. 
Old rice paddies, Caloocan, Masambong, etc., fl. Oct.-Dec., and probably 
in other months; widely distributed in the Philippines, probably an intro- 
duced plant here. India to Japan southward to Malaya. 
2. JUSSIAEA Linnaeus 
Erect, often suffrutescent, or prostrate and spreading herbs growing in 
wet or marshy places. Leaves alternate, entire or nearly so. Flowers 
yellow or white, axillary, solitary, the pedicels usually 2-bracteolate. Calyx- 
tube linear, the teeth 4 to 6, persistent, linear. Petals 4 to 6, epigynous. 
Stamens twice as many as the petals, inserted with them. Ovary 4- or 
5-celled; ovules many, in several axile rows in each cell. Capsule linear, 
round, or angular, 4- or 5-celled, 8- or 10-ribbed, septicidal or opening 
irregularly. (In honor of A. L. de Jussieu, a French botanist.) 
Species about 36, in all tropical countries, most numerous in America, 
8 in the Philippines. 
1. A spreading or floating aquatic plant with obovate leaves and 5-merous 
ee eek mi ee a) OS ad 2 2 oat a RS 1. J. repens 
1. Erect, herbaceous or suffrutescent, usually branched, the leaves lanceolate, 
the flowers 4-merous, yellow. 
2. Flowers large; pods about 5 mm thick................0.0......... 2. J. suffruticosa 
2. Flowers small; pods 1 to 2 mm thick..............002-2022200...---+- 3. J. linifolia 
1. J. repens L. 
A creeping or floating, glabrous, herbaceous plant, the leaves obovate to 
oblong-obovate, rounded or obtuse, 1.5 to 5 em long, the floating stem 
frequently with cylindric white vescicles at the nodes. Flowers axillary, 
