330 ACANTHACE^. Dianllera. 



as ovate. Justicia hiimilis, Michx. Fl. 1. 8 ; Pursh, Fl. i. 13 ; Vahl, Enum. i. 43. Eh,i/ti- 

 (j/ossa humilis, Nees, 1. c. 340. R. obtusifotia, Nees, 1. c. 338, as to N. Am. plant ? — Muddy 

 borders of streams, S. Carolina, near the coast, to Texas. Narrowest leaved forms much 

 resemble the tropical D. pectoralls, which has smaller flowers and fifth sepal small. 

 D. parviflora, Drejem pamflora, Buckley in Proc. Acad. Philad. Dec. 1861, is like the 

 preceding, so far as an imperfect specimen shows: but leaves shorter (an inch or so long), 

 lanceolate from a broader and rounded subsessile base, the yoimger with a few hairs, and 

 the inflorescence puberulent, with also some short-stipitate glands. — W. Texas, Buckley. 



§ 2. Anomalous species, cinereous-pubescent : flowers small, in the axils of 

 ordinary leaves and in slender spikes terminating the branches. {D. Sagrceana, 

 Griseb. with somewhat similar habit, is Justicia Sagrceana, the lower anther-cell 

 calcarate.) 



D. parvifolia. Much branched from a somewhat woody root or base, a span or more 

 high, erect or diffuse : leaves ovate, 3 to 8 lines long, petioled ; upper axils floriferous : 

 flowering branches mostly extended into slender sparsel3'-flowered spikes : bracts with 

 bractlets and sepals subulate, small : corolla wliitt? or purple, 4 lines long; the lips nearly 

 equal and about the length of the rather broad tube : anther-cells separated by a narrow 

 connective, somewhat oblique and one a little lower. — Shuueria parrifolia, Torr. Bot. Mex. 

 Bound. 122. — Dry soil, W. Texas to New Mexico, Wriijht, Srhott, Lindheimer, &c. Re- 

 ferred to this genus on the authority of Benth. & Hook. Gen. ii. 1114. 



13. G-ATESIA, Gray. (In memory of Dr. Hezehiah Gates, who almost half 

 a century ago made and distributed a collection of Alabama plants, upon one of 

 which, viz. Petalostemon corymbosus, mistaken for a Composita, Bertoloni founded 

 his genus Gatesia.) — Single species : fl. summer. — Proc. Am. Acad. xiii. 365. 



G. leete-virens, Gray, 1. c. Perennial herb a foot or two high, puberulent or almost 

 glabrous : stem wlien dry with a contracted ring above each node, as if articulated : leaves 

 bright green, membranaceous, ovate-lanceolate or oval and acuminate at both ends (2^ to 

 5 inches long), petioled: flowers in oblong and somewhat strobilaceous usually short- 

 peduncled spikes, both terminal and axillary : bracts oval or obovate with narrowed base, 

 mucronate, hirsute-ciliate (half inch long) : bractlets similar but smaller, about half the 

 length of the clavate-oblong firm-coriaceous capsule : calyx somewhat glumaceous, deeply 

 6-parted ; lobes setaceous-subulate, sparingly hirsute-ciliate, the innermost smaller : corolla 

 white or flesh-color, almost salverform (about half inch and the lobes 2 lines long) : stipe- 

 like base shorter than the body of the 4-seeded capsule. — .Tiisticla hete-virens, Bucklej' in Am. 

 Jour. Sci. xlv. 176 (1843). Rhijtiijlossa vlrklijiom (meant for viridifolia), Nees in DC. Prodr. 

 xi. 346. Didlptera Halei, Riddell, Cat. Fl. Ludov. in N. Orl. Med. Jour. 1852 ; Chapm. Fl. 

 305. — Shady damp ground. Northern Alabama, Buckki), Cabell, Beaumont. Lookout Moun- 

 tain, Tennessee, .4. //. Curtiss. W. Louisiana, Hale. Eastern Texas, Wri(//it. " Flowers open- 

 ing in the night : corolla dropping early next day," Dr. Cabell. More allied to Tetramerium 

 than to Diantltera, having only the capsule of the latter, and the bractlets of Didiptera. 



14. TETRAM£;RIUM, Nees. {TetQaixsQ^g, quadripartite, limb of corolla 

 4-parted,) — Low perennial herbs, or barely suffrutescent at base (of and near 

 Mexico) ; with oblong or ovate and petioled leaves, dense spike terminating stem 

 and branches, its 4-ranked bracts imbricated and little exceeded by the (white or 

 purplish) corollas. — Bot. Sulph. 147, & DC. Prodr. xi. 467. (Henrga, ISiees, 

 referred here in Benth. & Hook. Gen. ii. 1121, is distinguished by its small 

 primary bract, or ordinary leaf in place of it, and conspicuous herbaceous bractlets, 

 as of Didiptera, which are usually vaginate and connate.) 



T. hispidum, Nees, 1. c. Hirsute-pubescent, and the ovate or oblong strongly 3-5- 

 nervcd spinulose-pointed bracts hispid: leaves oblong, 1 or 2 inches long: calyx 4-parted: 

 lobes of the corolla shorter than its tube: seeds muriculate. — T. nervosum, \a.T., Torr. 

 Bot. Mex. Bound. 125. — S. Arizona to the borders of Texas. (Mex.) 



