Ebjtraria. ACANTHACE.E. 323 



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

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

 obcompressd^on a slender clavate stipe. Seeds very flat, minvitely scabrous. 



8. ANISACANTHUS. Corolla with elongated tube gradually somewhat wider at the 

 throat; the 1 lobes similar, lanceolate, entire, erectish recurving; the posterior (or upper 

 lip) rather more deejily separated. Stamens and style equalling or exceeding the corolla- 

 lobes. Capsule ovate on the long clavate stipe. Seeds smooth or I'ugulose. 



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



= The lower calcarate or mucronate 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. 



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

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

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



11. 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 far 

 as known, flat. 



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

 into narrow or subulate divisions, the fiftli commonly smaller : stamens not surpassing 

 the corolla. 



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

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

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

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

 lets small 



13. GATES! A. Corolla with slender tul)e, somewhat amjiliate throat, and almost equally 

 4-lobed sj)riading limb; lobes nearly similar, ])lane, ovate. Anthex'-cells oblong, contig- 

 uous and similar, but one a little lower an<l oblique. Stigma capitellate. Seeds gla- 

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

 foliaceous, 1-nerved and pinnately veined or triplinerved. 



-t— 4— Placentaj, 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 glnmaceous, 4— 5-parted ; the divisions subulate 

 or linear-lanceolate, 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-j)arteil liml), or somewhat bilabiate; the 3-parted and widely spreading lower 

 lip ratiier more sejiarated from the less spreading or rather erect and slightly concave 

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

 either contiguous or separated by a slightly dilated connective. Seeds flat, muriculate 

 or papillose. Spikes strobilaceous, 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 

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

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

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

 not strobilaceous-spicate. 



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

 duncle and .spike covered with 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, thinni.sh ; flowers small, solitary and 

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

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

 excl. spec. 



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

 to (J inches long), with usually undulate margins ; scape a foot or less high, bearing a short 



