SCROPHULAMACEAE 421 



2. CENTRANTHERA R. Brown 



Erect, rigid, scabrid, branched herbs with oblong to linear, entire or 

 toothed, opposite leaves, or the upper ones alternate. Flowers alternate, 

 spicate, bracteate and 2-bracteolate. Calyx spathe-like, split on one side, 

 the lobes cohering or free. Corolla-tube elongated, curved, inflated above, 

 the hmb oblique, the lobes spreading, subequal. Stamens 4, in 2 pairs, 

 included; anthers meeting in pairs, the cells spurred; filaments hairy. Cap- 

 suTe ovoid, loculicidal, the seeds very numerous, small. (Greek "spur" and 

 ' flower," from the spurred anthers.) 



Species 5, India to China, Malaya, and Australia, 1 in the Philippines. 



1. C. hisplda R. Br. 



An erect, branched, rigid, scabrous, hairy herb 20 to 60 cm high. Leaves 

 linear to linear-oblong, entire, acute or obtuse, 1 to 3 cm long, sessile. 

 Flowers scattered, alternate, sessile. Calyx greenish, usually tinged with 

 purple, about 8 mm long, the lobes cohering. Corolla yellow, the tube tinged 

 with reddish-purple, about 2 cm long, the limb 1.7 cm in diameter. Capsule 

 abqut 7 mm long, surrounded by the persistent calyx. 



In open dry grass lands, La Loma, San Pedro Macati, etc., fl. Nov.-Jan.; 

 widely distributed . in the Philippines. India to China, Malaya and Aus- 

 tralia. 



3. RUSSELIA Jacquin 



Erect shrubs with green angular branches, the leaves opposite or verti- 

 cillate, few, those of the branches usually reduced to small sc^ales. Cymes 

 dichotomous, bracteate, lax or dense, few- to many-flowered. Calyx deeply- 

 5-fid, the segments imbricate. Corolla red, the tube cylindric, the limb 

 5-fld, the lobes all subequal, spreading. Stamens 4, in 2' pairs, included; 

 style filiform; ovules numerous. Capsule subglobose, dehiscent, the valves 

 2-fid. (In honor of A. Russel, an English physician.) 



Species B or 6 in Mexico and Central America, 1 now widely cultivated 

 in warm countries. 



1. R. JUNCEA Zucc. Coral Flower. 



An erect, branched, glabrous, nearly leafless plant with green angled 

 stems 1 to 2 m high. Branches whorled, slender, wiry. Leaves few, scat- 

 tered, small, oblong to oblong-ovate, 1.5 cm long or less, often wanting. 

 Flowers in lax, few-flowered, racemosely arranged cymes. Calyx greenish, 

 about 3 mm long, ovoid or cup-shaped, regularly 5-lobed. Corolla bright- 

 red, about 2.5 cm long, about 3 mm in diameter below, slightly enlarged 

 upward, nearly regular, very slightly 2-lipped, the lobes 5, ovate or oblong- 

 ovate, subequal, about 3 mm long. (Fl. Filip. pi. 461.) 



Cultivated for ornamental purposes, fl. Nov.-Feb., in some parts of the 

 Philippines spontaneous. A native of Mexico and of comparatively recent 

 introduction in the Philippines. 



4. BACOPA Aublet 



Glabrous, usually small, erect or spreading, often punctate herbs. Leaves 

 entire or toothed. Flowers axillary or racemose, blue, white, or yellow, 

 the pedicels bracteate or not. Sepals 5, the upper one often large. Corolla- 

 tube cylindric, 2-llpped, the lips . spreading, the upper lip outer in bud, 



