420 A. FLORA OP MANILA 



lobed, sometimes spathe-like. Corolla 4- .or 5-lobed, usually 2-lipped, some- 

 times tubular or rotate, the lobes imhncate in bud. Stamens usually 4, 

 in 2 pairs, with a rudimentary fi fth o ne, rarely 2 or 5 perfect. Ovary 

 2-celled; style simple; ovules many, ral-ely 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 tubular 1. Scoparia 



2. Corolla tubular or campanulate, not or obscurely 2-lipped. 



3. Calyx spathe-like, split down one side 2. Centranthera 



3. Calyx regularly 5-lobed; stems green, 4-angled, nearly leafless; cul- 

 tivated plants with bright-red, cylindric flowers 3. Rueselia 



2. Corolla distinctly 2-lipped. 



3. Calyx-segments unequal, imbricate - 4. Bacopa 



3. Calyx-segments equal, usually valvate. 

 4. Calyx-tube cylindric, not winged. , 

 5. Anther-cells separate. 



6. Flowers yeHow 5. Lindenbergia 



6. Flowers blue or purplish 6. Limnopkila 



5. Anther-cells contiguous. 



6. Corolla with a 2-lobed palate at the throat 7. Mazus 



6. Corolla-throat not appendaged 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 



fliaments arched, the anthers touching 10. Bonnaya 



2. Leaves narrow, entire, fleshy; flowers small^ the anthers not conniving, 



11. Dopatriwm 

 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. Capsult 

 globose or ovoid, the valves thin, their marg:ins inflexed. (Latin "broom."] 



Species 5 or 6, all "American, the following now found in most tropica 

 countries. 



1. S. DULCIS L. 



An erect, much-branched, glabrous, herbaceous, or suffrutescent plan 

 26 to 80' cm high. Leaves opposite and whorled, lanceolate to elliptic o: 

 oblanceolate, toothed, acute, 0.5 to 2 cm long, narrowed below to the shor 

 petiole. Flowers small, very numerous, in pairs, their pedicels slender, : 

 cm long or less. Corolla white. Capsule ovoid to globose, 2 to 3 mm ii 

 diameter. (Fl. Fillp. pi. 19.) 



Very common in open waste places, roadsides, etc., fl. all the year; i: 

 and ivbout towns throughout the Philippines, probably of very early intrc 

 duction. A native of tropical America, now found in most other tropics 

 countries. 



