404 ACANTHACEAE. 



what decurrent on the petioles; flowers violet to purple, in dense terminal 

 braeted spikes 3-7 em. long; bracts oblong, pubescent or oiliate, 12 mm. long 

 or less, the lo'ner pointed, the upper truncate and cuneate; braetlets narrower 

 than the bracts; calyx-segments lanceolate, about 1 cm. long; corolla-tube 

 about 1.5 cm. long, the upper lip about as long as the tube, the lower some- 

 what longer; capsule 1.5-2 cm. long, acute, pubescent. 



Waste places, New Providence and Long Island : — Hispaniola ; St. Thomas to 

 Barbadoes and Grenada ; continental tropical America. Justicia. 



7. DIAPEDIUM Konig; Konig & Sims, Ann. Bot. 2: 189. 1805. 



[DiCLlPTERA Juss. Ann. Mus. Paris 9: 267. 1807.] 



Herbs, with entire petioled leaves, and blue, red, or violet flowers sub- 

 tended by involucres of 2-4 bracts, the inflorescence mostly cymose or spieate, 

 the involucres subtending 1 flower or several. Calyx 4-5-cleft, the lobes linear 

 or subulate. Corolla-tube slender, slightly enlarged above; upper lip erect, 

 concave, interior in the bud; lower lip spreading, entire or 3-toothed. Stamens 

 2; anther-sacs parallel, sometimes unequal, sep'arated by a narrow connective. 

 Style filiform; ovules 2 in each cavity of the ovary. Capsule flattened, ovate 

 or suborbicular, 2-4-seeded. Placentae separating elastically from the waUs 

 of the capsule. Seeds compressed, nearly orbicular. About 60 species, of 

 warm and tropical regions. Type species: Justioia chinensis L. 



1. Diapedium assurgens (L.)"Kuntze, Eev. Gen. PI. 485. 1891. 



Justicia assurgens L. Syst. ed. 10, 850. 1759. 

 Dicliptera assurgens Juss. Ann. Mus. Paris 9: 269. 1807. 



Erect, often much branched, glabrous or somewhat puberulent, 3-15 dm. 

 high. Leaves ovate to oblong-lanceolate, 4-10 cm. long or the upper smaller, 

 acute or obtuse at the apex, obtuse or narrowed at the base, the petioles 

 slender; flowers in small braeted clusters, in slender interrupted, simple or 

 branched spikes 5-15 cm. long; bracts lanceolate or spatulate, 8-15 mm. long; 

 calyx about 4 mm. long, its linear-lanceolate lobes as long as the tube or 

 longer; corolla scarlet or red, 2^2.5 cm. long, its tube curved, its lips lance- 

 olate; capsule 5-6 mm. long. 



Waste grounds, scrub-lands and thickets, throughout the archipelago from Abaco 

 and Great Bahama to the Anguilla Isles and Crooked Island : — Florida ; West Indies ; 

 continental tropical America. Diapediuji. Erroneously called HonEiTSUCKlb. 



8. THUNBEEGIA Eetz. Phys. Sallsk. Handl. 1: 163. 1776. 



Herbs or herbaceous vines, with opposite, mostly hastate or cordate leaves, 

 and large 2-braeted flowers solitary in the axils or in terminal racemes. Bracts 

 foliaceous, large. Calyx short, annular. Corolla with an oblique, more or less 

 flattened tube enlarged above, and a spreading 5-lobed limb, the lobes rounded, 

 contorted, nearly equal. Stamens 4, didynamous, borne near the base of the 

 corolla-tube, the fllaments thickened below, the anthers with an apiculate con- 

 nective. Disk fleshy. Ovary fleshy; style dilated at the apex; ovules 2 in 

 each cavity. Capsule coriaceous, globose, abruptly beaked, loculieidally dehis- 

 cent. [Commemorates Karl P. Thunberg, 1743-1S2S, eminent Swedish travel- 

 ler and botanist.] About 40 species, natives of the Old World tropics. Type 

 species: Thunbergia capensis Retz. 



Petioles not wing-margined. 1. T. fragrans. 



Petioles wing-margined. 2. T. alata. 



