220 BOTANY 



Log the special peduncle; bracts ovate-cordate, 2-5-flowered (some of 

 them aborting); flowers 8-10 long, light pnrple, lower lip 3-toothed, upper 

 lip ovate. Very variable in foliage and inflorescence. — Cienega, Southern 

 Arizona. Besides this form, 1 have another resembling it in all respi 

 Bave that the inflorescence is more simple; two or three peduncles, l-U 

 long', rising from the axils at a node, and each terminated by a single pair of 

 the usual ovate-cordate bracts. This difference is constant in my specimen 

 (571), and might entitle it to a specific rank were it not for the variability 

 in just this respect in D. resupinata. Also from Cienega, Arizona. 



Tetramerium* HI8PIDUM, Xecs (T. nervosum^ Nees, "vBi.hispidumfoliis 

 ovato-oblongis ohtusiusculis vcl acutis (non acuminatis)", Torr. Bot. Mex. Bound. 

 ]). 125). — Bracts conspicuously ciliate, oblong; flower yellowish-white (with 

 the anthers visible through a lobe of the lower lip as a brown spot), 5-7" 

 long. — In the Sanoita Valley, Arizona (686), near (probably) where the 

 specimens described in Bot. Mex. Bound. I. c. were obtained. 



VERBEXACE^E. 



Lipfia Wrightii, Gray (Torr. in Bot. Mex. Bound, p. 126). {Aloysia 

 scorodonoides, II. B. K. Nov. Gen. et Sp. 2, p. 260, is a different plant.) — Shrub, 

 2-4 feet high, much branched; leaves oval, 3-8" long, thickish, deeply crenate, 

 rugose above and white tomentose-pubescent below, abruptly tapering to a 

 short petiole ; hairy spikes 1-1 h' long, paniculate ; flowers white, 1-2" long, 

 tubular, with a spreading, subregular border ; stamens subequal, short. 

 Calyx with long, spreading, white hairs. The mature fruit readily separates 

 into two nutlets. — Mount Turnbull (170 a, Loew), and elsewhere in Arizona. 



Lippia nodiflora, Michx. — Herbaceous or somewhat woody ; stem 

 creeping, rooting <^ the joints.; peduncles long, slender; entire plant finely 

 pubescent; leaves oblanceolate or cuneate, serrate toward the apex: white 



* Teti:\mi kiim. Nees. — Herbaceous bracts narrow, more or less connate in pairs, including single 

 Bowers with or without rudiments of others. Calyx short, 5-cleft ; lobes linear, delicate. Tube of co- 

 rolla Blender, cylindrical ; limb 2-lipped, the hinder li[> interior, obovate or oblong, erect, entire, con- 

 cave, the lower lip 3-parted, with the oblong lobes Bat, spreading, the middle one outside. Stan 

 inserted in the ihroat and sub-equalling the corolla : anthers 2-oelled, the c<pial, pointless, parallel cells 

 separated by a broadisb connective; staminodia 0. Disk rather thick. Style filiform, the Btigfl 

 BUDClavate apex with 2 very Bhorl lobes; 2 ovules in cither cell. Capsule ovate-oblong, tapering into a 

 solid stipe at base ; placenta during dehiscence torn loose from the valves. Seeds 1. or fewer by abortion, 



piano-compressed, Bub-orbicnlar.— Pubescent herbs, often shrubby at base. Leaves entire, flowers 

 rather small, pallid.— BENTH. A Hook. 



