338 VERBENACE.E. Verbena. 



ceolate, acute : fructiferous pedunculate spikes dense, oblong : fructiferous calyx with teeth 

 very much shorter than the oblong tube : corolla light purple : nutlets, &c., of V. Aubletia. 

 — Near Frontera, on the borders of Texas, and adjacent New Mexico, and Chihuahua, 

 Wright (no. 1504). 



V. VENOSA, Gillies & Hook.j of S. America, one of the species cultivated for ornament, has 

 escaped into prairies in the vicinity of Houston, Texas. 



6. LiPPIA, L. (Dr. A. Lippi, killed in Abyssinia early in the 18th cen- 

 tury.) — Herbs or shrubs (American, mainly southern, a few African, (fee, and one 

 or two widely dispersed species) ; with spikes or heads of small flowers, in summer. 

 Leaves often verticillate. 



§ 1. Aloys I A, Schauer, Benth. & Hook. Flowers in slender and naked spikes, 



with small and narrow bracts : calyx about equally 4-cleft, herbaceous, often 



densely hirsute, the tube not compressed : nutlets thin-walled : shrubs, with foliage 



commonly sweet-aromatic. — Aloysia, Ortega. (Z,. citriodora, of Uruguay, with 



smooth calyx, &c., is the Lemon Verbena shrub, of cultivation.) 



L. lycioides, Steud. Shrub 4 to 10 feet high, with long and slender branches, sometimes 



splnescent, minutely puberulent: leaves (3 to 12 lines long) lanceolate-oblong, obtuse, 



1-nerved, scabrous above, pale beneath, veinless, small and entire on flowering branches, 



larger and incised or few-toothed on strong sterile shoots: spikes axillary, raceniose- 



panicled, filiform : flowers white or tinged violet (fragrance of vanilla). — Schauer in Fl. 



Bras, ix.'t. 36 & DC. Prodr. xi. 574. Verbena liguslrina. Lag. Nov. Gen. & Spec. 18. — Texas 



to Arizona and " California," Coulter. (Mex., Uruguay, &c.) 



L. Wrightii, Gray. Shrub 2 to 4 feet high, with many spreading slender branches, 



minutely canescent-tomentose : leaves (4 to 8 lines long) orbicular-ovate, crenate, rugose, 



abruptly short-petioled : spikes short-peduncled, densely flowered : calyx-teeth triangular : 



corolla white, glabrous within : " odor of Sage." — Am. Jour. Sci. ser. 2, xvi. 98; Torr. in 



Bot. Mex. Bound. 126. — S.' W. Texas to Arizona, Thurher, Wright, Palmer, &c. (Adjacent 



Mex., where var. macrostachya, Torr. 1. c, approaches L.scorodonioides, HBK., of S. Am.) 



§ 2. ZapXnia, Schauer, Benth. & Hook. Flowers capitate or in short and 



dense spikes, subtended and imbricated by broad bracts. 



* Bracts decussately 4-ranked, complicate-carinate, persistent: flowers very small. 

 L. graveolens, HBK. Shrubby, 2 to 4 feet high, cinereous with close pubescence : leaves 

 ovate-oblong or 'oval, crenate-reticulate-rugose, hirsute-pubescent above, canescent beneath, 

 petioled : umbellate peduncles 3 to 6 in each axil, shorter than the leaves : bracts thin, 

 ovate, acute, silky, shorter than the yellowish-white salverform corolla. — Nov. Gen. & 

 Spec' ii. 266 ; Schauer, 1. c. L. Berlandieri, Torr. 1. c, not Schauer. — Texas, along and 

 near the Uio Grande. (Mex., &c.) 



* * Bracts several-ranked, concave or flattish : calyx thin, more or less compressed fore and aft 

 and the sides carinate. — § Zf^xmia, Schauer. 



H- More or less shrubby, erect: heads on short axillary peduncles. 

 L geminata HBK. 1. c. Pubescent leaves ovate or oblong, closely serrate, tripllnerved, 

 pinnately veined, and with rugose-reticulated veinlets, minutely strigose above, canescently 

 tomentose-pubescent beneath, petioled: peduncles mostly solitary in the axils, hardly 

 longer than the petiole : Jiead globular, at length cylindraceous : bracts broadly ovate, 

 abruptly cuspidate-acuminate, villous-canescent, a little shorter than the purple or violet 

 corolla. (Foliage with odor of citron.)- Verbena lanlanoldes, L. — S. Texas on the Kio 

 Grande. (Mex. to Uruguay.) 



* * Herbaceous, procumbent or creeping: pubescence of fine and close hairs fixed by their middle 

 and both ends acute: peduncles chiefly axillary and slender: bracts closely imbricated: calyx 

 stronclv flattened fore and aft, with carinafe margins, and cleft into 2 lateral more or less con- 

 duplicate lobes : limb of corolla manifestly bilabiate; the smaller upper one refuse or emargmate: 

 pericarp crustaceous or corky, not readily separating into the two nutlets. 



L. cuneif olia, Steud. Diffusely branched from a lignescent perennial base, procumbent 

 (not creeping), minutely canescent throughout : leaves rigid, cuneate-linear, sessile, incisely 



