306 
21. Cordylanthus. Calyx spathe-like, 2-leaved: corolla tubular, with lips com- 
monly of equal length. 
1. LEUCOPHYLLUM Humb. & Bonpl. 
Low and much-branched shrubs which are densely securfy-tomentose 
with usually silvery-white wool, with showy violet-purple flowers on 
short bractless peduncles in the axils of the small obovate or roundish 
and short-petioled entire leaves, corolla with 5 rounded and spreading 
nearly equal lobes, 4 didynamous included stamens (rarely 5), anther- 
cells confluent at apex, and a 2-valved pod. 
1, L, Texanum Benth. Shrub 6 to 24 dm. high: leaves tomentose, obovate, 12 
mm. or more long, almost sessile: calyx-lobes lanceolate-oblong: corolla almost 
campanwate; the limb 2.5 em, in diameter, delicately soft-villous within,—Through- 
out the southern borders of Texas. 
2, L. minus Gray. Lower, 3 to6dm. high: leaves minutely silvery-canescent, 
obovate-spatulate with long tapering base 12 mm. or less long: calyx-lobes linear: 
corolla with narrower and more funnelform tube and throat which much execed the 
limb, which is 12 mm.in diameter and sparsely pubescent within.—Southern bor- 
ders of Texas, perhaps the more abundant species westward, 
2. VERBASCUM L. (MULLEIN.) 
Tall and usually woolly biennial herbs, with alternate leaves (those 
of the stem sessile or decurrent), flowers in large terminal spikes or 
racemes, 5-parted calyx, 5-lobed rotate corolla with lobes broad and 
rounded and little unequal, 5 stamens with all the filaments (or the 3 
upper) woolly, and a globular many-seeded pod. 
1. V. Thapsus IL, (COMMON MULLEIN.) Densely woolly throughout: stem tall 
and stout, simple, winged by the decurrent bases of the oblong acute leaves: flowers 
yellow (rarely white), ina prolonged and very dense cylindrical spike.—One of the 
most common of introduced weeds in the Atlantic States. Reported only from Gil- 
lespie County (Jermy), but, of course, widely distributed in the cultivated parts of 
Texas. 
3. LINARIA Tourn. (TOAD-FLAX.) 
Herb, with at least all the upper leaves alternate, 5-parted calyx, 
personate corolla with the prominent palate often nearly closing the 
throat and spurred at base on the lower side, 4 stamens, and thin pod 
opening below the summit by one or two pores or chinks. 
1. L. Canadensis Dumont. Slender and glabrous: leaves linear, entire, 2 to 4 
mm. wide: flowers small, blue, ina naked terminal raceme; pedicels erect, not longer 
than the filiform curved spur of the corolla,—Sandy or gravelly soil throughout 
Texas, 
4. ANTIRRHINUM Tourn. (SNAPpRAGON.) 
Corolla merely saccate or gibbous at base; otherwise nearly as Lina- 
ria, or the palate in some species much less prominent. 
1. A. maurandioides Gray. Climbing by the slender tortile petioles and axillary 
peduncles: leaves triangular-hastate or the lower cordate-hastate; the lateral lobes 
often with a posterior tooth: corolla purple or sometimes white, 12 to 25 mm. long, 
with a nearly closing palate: sepals lanceolate, very acute.—Throughout southern 
and western Texas; also common in cultivation, 
