402 FLORA OF TEXAS. 



tate ; style simple, or 2-cleft at the apex ; capsule narrow- 

 ed below the middle, flattened contrary to the partition, 

 4-12-seeded ; seeds borne above the middle, supported by 

 curved appendages of the placentae. Herbs, with tumid 

 joints; leaves entire, opposite; /?oz(;e?'5 axillary or clustered, 

 nearly sessile ; corolla white, blue, or purple. Perennial. 



D. OBLOi^"GiFOLius. Pubescent and somewhat hoary; 

 stem 4-angled, erect from a creeping base, simple or spar- 

 iftgly branched ; leaves nearly sessile, oval or obovate ; 

 flowers solitary or 2-3 in a cluster ; calyx-\6be^ subulate- 

 setaceous, as long as the oblong bracts, and tube of the 

 spotted corolla; anther-cells pointed at the base; style 

 simple ; capsiile 4-seeded. Stem 6'-12' high ; leaves J'-l' 

 long; corolla V long, rather exceeding the leaves. 



DIANTHERA, Gron. 



Calyx 5-parted ; corolla bilabiate, the upper lip emargi- 

 nate, the lower 3-lobed, rugose or veiny in the middle, 

 spreading; stamens 2 ; anther-cells separated, one placed 

 lower down than the other; s^i^ma simple, acute; capsule 

 flattened, narrowed downward, bearing the seeds above the 

 middle ; seeds mostly 4, supported by the appendages of 

 the placentae. — Perennial smooth herds, with opposite en- 

 tire leaves, and short-bracted mostly alternate floiuers in 

 long-peduncled axillary spikes. 



D. Americaita, L. Stem tall, angled; leaves long, 

 linear-lanceolate ; spikes oblong, dense or somewhat capi- 

 tate, on peduncles as long as the leaves. (Justicia ensi- 

 formis. Ell.? J. pedunculosa, Michx.) In slow-flowing 

 streams. July and August. Stem 2° high; leaves and 

 peduncles 4-6' long ; spike ^' long ; floivers pale purple. 



DICLIPTERA, Juss. 

 Herbs, with simple leaves; flowers purple, scarlet, or 



