4 XCVIII. ACANTHACEH (BURKILL AND CLARKE). 
Valves of the placenta rising elastically from the base of 
the ripe capsule so as to throw out the seeds. 
Floral leaf containing 3-1 ebracteate ebracteolate flowers 23. Piayopsis. 
Each flower with 2 large ovate or elliptic bracteoles . 24, PeranipruM. 
TrreIV. Acantheee.—Corolla 1-lipned; tube short. Stamens 4; anthers 
1-celled; pollen ellipsoid or subglobose, with longitudinal bands. Ovary with 2-1 
ovules in each cell. 
Calyx 4-partite to the base. Pdsticous lip of corolla want- 
ing. 
Seeds hygroscopically hairy . . . . 25. Buerraris. 
Seeds without hairs . . . . . . . 26. Acanruus. 
Calyx 5-partite to the base. Corolla limb split down the € 
posticous face, so that the lip has 5 lobes all on one 
side. te 
Sepals all similar, posticous 1-nerved . . . . 27. ScLEROCHITON. — op 
Posticous sepal larger, 2-nerved, often 2-toothed at the ir 
tip . . : . : . . 28. CrossanpRa. 
1s- 
1a 
Tre V. Justiciese.— Corolla-limb subequally 5-lobed or 2-lippet, one loliwe 
wholly within, one wholly without in the bud. Ovules 2-1 in each cell (except ms 
Crabbea). Seeds without hygroscopic hairs. 
2 a 
Subtribe i. Terranpre.—Stamens 4, all fertile; anther- 
cells rounded at the base. ‘ ; 
Ovules 3 or more in each cell. Corolla 2-lipped ; anther- 
cells 2 . . . : . . . 
. . 29. CRABBEA. 
Ovules 2-1 in each cell. 
Corolla distinctly 2-lipped. Pollen short ellipsoid, longi- 
tudinally marked. 
Calyx 5-fid. 
Racemes elongated, many-flowered . . . 30. THOMANDERSIA. 
Spikes short, sometimes unilateral, bracteate . 31. Lepmacartuis. 
Calyx 4-fid. Flowers scattered subsolitary . . 32. Linpauga, 
Corolla not distinctly 2-lipped. 
Corolla inflated upwards, mouth oblique ; posticous 
stamens with 2-celled anthers. 
Anther-cells at equal height . . . . 33. ASYSTASIA. 
One anther-cell below the other, smaller . . 34, Fineria, 
Corolla-mouth funnel-shaped, hardly oblique ; posti- 
cous stamens with 1-celled anthers . . . 35. NEURACANTHUS. 
Subtribe ii, Barterrex.—Stamens 2 fertile, 2 small rudi- ~ 
mentary often added. Calyx large, 4-partite to the 
base, 7.e., 2 anticous lobes connate nearly or quite to 
the tip. Anther-cells 2, rounded at base; pollen 
globose, reticulated . . . . : 
Subtribe iii, Eranroemes.—Stamens2. Corolla-tube long, 
linear ; limb subequally 5-fid, spreading. Anther- 
cells rounded at base ; pollen subglobose, slenderly 
marked longitudinally. 
Anther-cells 2, at equal height 
Anther-cell 1 . . . 
36. Barteria. 
. 37. ERrantruemum. 
. 38. Rusprortia. 
Subtribe iv. Evususticrex.—Stamens 2. Corolla dis- 
tinctly 2-lipped. Calyx small or slender, or enclosed 
by bracts or bracteoles, 5-fid (except in a few species 
of Justicia). Seeds tubercular or smooth, without 
needle-like hygroscopic hairs, rarely with stiff or minute 
scabrous hairs. 
