343 
Atlantic region to western Texas, A tall Texan form is var. SPECIOSA Gray, with 
very acutely serrate lanceolate leaves and dense and panicled spikes. Var. OBOVATA 
Gray is a form extending from the Gulf States through Texas to Arizona, with oblong 
or obovate and often obtuse leaves. 
2. P. intermedia Gray. Slender, 3 to 9dm. high, remotely leaved: leaves linear- 
lanceolate, repand-denticulate: spikes filiform, rather remotely flowered; calyx 
short and broadly campanulate, its teeth about as long as the tube: corolla 10 to 12 
mm. long, much dilated upward.-Barrens, extending from the Lower Mississippi 
Valley into Texas. 
22. MARRUBIUM Tourn. (HOREHOUND.) 
Whitish-woolly bitter-aromatic perennials, with rugose and crenate 
or cut leaves, many-flowered axillary whorls, tubular 5 to 10-nerved 
nearly equally 5 to 10-toothed calyx with teeth more or less spiny-pointed 
and spreading at maturity, upper lip of corolla erect and notched, 
lower lip spreading and 3-cleft, and 4 stamens included in the tube of 
the corolla. 
1. M. vulgare L. (COMMON HOREHOUND.) Stems ascending: leaves round-ovate, 
petioled, crenate-toothed: whorls capitate: calyx with 10 recurved teeth, the alter- 
nate ones shorter: corolla small, white.—A common escape into waste or open ground. 
23. LEONOTIS R. Br. 
Tall minutely soft-pubescent annual, with long-petioled ovate leaves, 
dense verticillastrate heads of showy scarlet or orange flowers, tubular 
10-nerved (at length incurved above and oblique at orifice) calyx with 
5 or more unequal spinulose-tipped teeth, slender 2-lipped corolla (upper 
lip erect or incurved and elongated, entire; lower short and spreading), 
and 4 stamens ascending under the upper lip with anthers approxi- 
mate in pairs. 
1. L. nepetzfolia R. Br. Leaves coarsely serrate or crenate, veiny; upper 
floral lanceolate: calyx about 8-toothed: corolla 2.5 em. long, orange-red, densely 
hirsute.—Naturalized from Africa, recorded from the eastern Gulf States, and now 
reported from Gillespie County (Jermy). 
24. STACHYS Tourn. (WoUNDWORT. HEDGE-NETTLE.) 
Annuals or perennials, with purple or rose-red flowers in 2 to many- 
flowered whorls approximate in a terminal raceme or spike, tubular 
bell-shaped equally 5-toothed calyx (or upper teeth united to form a 
lip), strongly 2-lipped corolla (upper lip erect or rather spreading, 
often arched, entire or nearly so; lower usually longer and spread- 
ing, 3-lobed, with middle lobe largest and nearly entire), and 4stamens 
ascending under the upper lip and with anthers approximate in pairs. 
* Root annual: corolla with short tube, mostly purplish or reddish. 
1. S. agraria Cham. & Schl. Low, hirsute-pubescent: leaves obtuse, crenate; 
lower subcordate and slender-petioled; upper subcordate or oval and subsessile; 
upper floral shorter than the small and several-flowered clusters; calyx even in fruit 
not over 4 mm. long, even lower corolla-lip hardly exceeding the subulate cuspidate- 
aristulate teeth.—Moist or shady places, common in southern Texas, from Brazos 
Santiago westward. 
