420 A FLORA OF MANILA 
lobed, sometimes spathe-like. Corolla 4- or 5-lobed, usually 2-lipped, some- 
times tubular or rotate, the lobes imbricate in bud. Stamens usually 4, 
in 2 pairs, with a rudimentary fifth one, rarely 2 or 5 perfect. Ovary 
2-celled; style simple; ovules many, rarely 2, in each cell. Fruit a small 
capsule. Seeds small. 
Genera 202, species nearly 3,000, in all parts of the world, 20 genera and 
about 36 species in the Philippines. 
1. Perfect stamens 4. 
2. Corolla rotate, not 2-lipped_or -tubularenir SRA 1. Scoparia 
2. Corolla tubular or campanulate, not or obscurely 2-lipped. 
3. Calyx spathe-like, split down one side..........0..000..0..... 2. Centranthera 
3. Calyx regularly 5-lobed; stems green, 4-angled, nearly leafless; cul- 
tivated plants with bright-red, cylindric flowers............ 3. Russelia 
2. Corolla distinctly 2-lipped. 
3. Calyx-segments unequal, imbricate............0..222.22..22-ceeeeeee ee 4. Bacopa - 
3. Calyx-segments equal, usually valvate. 
4. Calyx-tube cylindric, not winged. 
5. Anther-cells separate. - 
6, ROWEES VEUOW. = 2.0..-cec ie eee eee 5. Lindenbergia 
6... Flowers, blue or ‘purplisn.2.5 22s cee eee 6. Limnophila 
5. Anther-cells contiguous. 
6. Corolla with a 2-lobed palate at the throat................ 7. Mazus 
6. Corolla-throat not appendaged ......02.....0..220...------- 8. Vandellia 
4. Calyx-tube prominently 3- to 5-winged or keeled............ 9. Torenia 
1. Perfect stamens 2. 
2. Leaves broad, toothed, not fleshy; flowers solitary or racemose, the 
filaments arched, the anthers touching........................-....- 10. Bonnaya 
2. Leaves narrow, entire, fleshy; flowers small, the anthers not conniving. 
11. Dopatrium 
1. SCOPARIA Linnaeus 
Erect, branched, glabrous herbs or undershrubs with angular branches. 
Leaves small, opposite or whorled, entire or toothed. Flowers small, white, 
solitary or in pairs, axillary. Sepals 4 or 5, imbricate. Corolla rotate, 
4-fid, the throat bearded, the lobes subequal. Stamens 4, subequal. Capsule 
globose or ovoid, the valves thin, their margins inflexed. (Latin “broom.”) 
Species 5 or 6, all American, the following now found in most tropical 
countries. 
1. S. puucis L. 
An erect, much-branched, glabrous, herbaceous, or suffrutescent plant 
25 to 80 cm high. Leaves opposite and whorled, lanceolate to elliptic or 
oblanceolate, toothed, acute, 0.5 to 2 em long, narrowed below to the short 
petiole. Flowers small, very numerous, in pairs, their pedicels slender, 1 
em long or less. Corolla white. Capsule ovoid to globose, 2 to 3 mm in 
diameter. (FI. Filip. pl. 19.) 
Very common in open waste places, roadsides, etc., fl. all the year; in 
and about towns throughout the Philippines, probably of very early intro- 
duction. A native of tropical America, now found in most other tropical 
countries. 
