Elytrarid.. ACANTHACEiE: 323 



spreading and piano, or the posterior (interior in the bud) at first concave-infolded and 

 less spreading. Stamens nearly equalling the corolla-lobes. Capsule ovate, acuminate, 

 obconipressd, on a slender clavate stipe. Seeds very flat, minutely scabrous. 

 ,8. ANISAOANTHUS. Corolla with elongated tube gradually somewhat wider at the 

 throat; the 4 lo\>es similar, lanceolate, entire, erectish recurving; the posterior (or upper 

 lip) rather more deeply separatQil. Stamens and style equalling or exceeding the corolla- 

 lobes. Capsule ovate on the long clavate stipe. Seeds smooth or rugulose. 

 ++ ++ Anther-cells unequal or unequally inserted, one lower than the other or oblique ; 

 = The lower calcarate or mucronatc at base: corolla manifestly bilabiate; upper lip 

 erect and more or less concave, merely emarginate or 2-lobed at apex, not surpassed by 

 the stamens ; these inserted in or near the throat : calyx 5-parted (sometimes 4-parted), 

 small. 

 9. SIPHONOGLOSSA. Corolla with long-linear or filiform tube and short limb ; lower 



lip broad and spreading, 3-cleft. Anther-cells contiguous and parallel, but one higher. 

 XO. BELOPERONE, Corolla deeply bilabiate, but with tube much longer than limb; 

 throat narrow ; lower lip 3-lobed at apex, erect-spreading. Anther-cells somewhat unequal 

 and oblique, on a more or less dilated connective. Seeds globular or thickened ! 



1 1. JUSTICIA. Corolla with short tube, and rather ampliate throat seldom longer than 

 the limb ; lower lip spreading, 3-lobed. Anther-cells oblique and disjoined. Seeds, as fa.f 

 as known, flat. 



= == Anthers muticous, orbotli cells rarely mucronulate at base : calyx deeply 5-parted 

 • into narrow or subulate divisions, the fifth commonly siiialler : stamens not surpassing 

 the corolla. ' 



12. DIANTHERA Corolla bilabiate ; upper lip erect and concave or fornicate, entire or 

 2-tootIied; lower spreading and o-lobed, with a rugose or venose-reticulated convex base 

 or palate. Anther-cells ovato or oblong, not parallel, moderately or conspicuously dis- 

 joined on a dilated connective. Seeds glabrous, smooth, or echinulate-scabrous. Bract- 

 lets small 



13. GATESIA. Corolla with slender tube, somewhat ampliate throat, and almost equally 

 4-lobed spreading limb ; lobes nearly similar, plane, ovate. Anthei'-cells oblong, contig- 

 uous and similar, but one a little lower and oblique. Stigma capitcllate. Seeds gla- 

 brous, minutely rugulose. Spikes short and dense : bracts and bractlets membranaceo- 

 foliaceous, 1-nerved and pinnately veined or triplinerved. 



+^ -i— Placentae, by rupture of half-partition from the "base upward, at length separating 

 and diverging or incurving : anther-cells muticous, or rarely one or both mucronulate 

 at base : calyx small, dry, or somewhat glumaceous, 4-5-parted ; the divisions subulate 

 or linear-lanceoliite, equal, or the innermost (posterior) smaller: corolla with narrow 

 tube: filaments filiform. 



14. TETRAMERIUM. Flowers solitary (rarely 2 or 3) covered by a large and herbaceous 

 primary bract, and subtended by two small and narrow bractlets. Corolla with an almost 

 equally 4-parted limb, or somewhat bilabiate ; the 3-parted and widely spreading lower 

 lip rather more separated from tiie less spreading or rather erect and slightly concave 

 entire and obOvate or oblong upper lip. Anther-cells equal and parallel or nearly so, 

 cither contiguous or separated by a slightly dilated connective. Seeds flat, rauriculate 

 or papillose. Spikes strobflaceous, quadrifarious. 



15. DICLIPTERA. Flowers not covered by primary bracts (of main axis), but involu- 

 crate (either singly or in a fascicle) by 2 valvately opposed and nearly equal or 4 less 

 d.ilated and unequal herbaceous bractlets. Corolla deeply bilabiate ; upper lip erect, con- 

 cave or plane, entire or emarginate ; lower spreading, entire or 3-lobed at apex. Anthers 

 witli a narrow connective. Seeds either smooth or muriculate. Inflorescence various, 

 not strobilaceous-spicate. 



1. ELYTRARIA, Michx. {'EIvtqov, a case or cover, the scape or pe- 

 duncle and spike covered vrith imbricated bracts.) — Low perennial herbs (chiefly 

 tropical American) ; with leaves crowded at base of a naked scape or at summit 

 of a short naked stem, tapering to the base, thinnish ; flowers small, solitary and 

 ~ sessile under the bracts ; these and the scales of the scapes rigid-chartaceous or 

 glumaceous, alternate ! — Michx. FI. i. 8 (1803); Vahl, Enum. i. 106 (1804), 

 excl. spec. 



E. virgata, Michx. Acaulescent : leaves from oblong to elongated spatulate, obtuse (2 

 to a inches 'long), with usually undulate margins : scape a foot or less high, bearing a short 



