1042 LAMIACEAE 
29. PYCNOTHYMUS Small. 
Perennial shrubby plants, glabrous or nearly so below the inflorescence. Leaves 
opposite, sometimes with smaller ones clustered in the axils: blades narrow, entire, revo- 
lute. Flowers in dense conspicuously pubescent bracted terminal raceme-like panicles. 
Calyx very delicate: tube campanulate, 10-ribbed: lobes 5, silky. Corolla purple or 
whitish : tube several times longer than the calyx: limb 2-lipped, the upper lip erect, 
entire or notched : lower lip 3-lobed, spreading. Stamens 4: anthers 2-celled ; sacs sepa- 
rated. Nutlets smooth, dull. : 
1. Pycnothymus rígidus (Bart.) Small. Stems diffusely branched, the branches 
spreading, 1-6 dm. long, widely branched : leaves numerous ; blades rigid, lanceolate, 5-11 
mm. long, acute, sharply revolute, sessile or nearly so: head-like racemes subglobose or 
cylindric, 1-4 cm. long: calyx softly hirsute, 2.5-3 mm. long ; lobes lanceolate or oblong- 
lanceolate, acutish, much longer than the tube: corolla light purple, minutely pubescent ; 
tube gradually dilated, the lips rounded, the lobes of the lower one nearly equal: nutlets 
less than 1 mm. long. ([Satureia rigida Bart. ] 
In sand and pine lands, Florida. Spring. 
30. MICROMERIA Benth. 
Perennial herbs or shrubby plants, often with creeping stems. Leaves opposite: 
blades various, often broad, entire or sparingly toothed. Flowers few or many in remote 
or contiguous axillary clusters, or sometimes solitary in the axils. Calyx nearly tubular : 
tube usually 13-ribbed : lobes 5, nearly equal, sometimes disposed so as to give the calyx a 
2-lipped character. Corolla small, often very small, somewhat lorger than the calyx, 2- 
lipped : upper lip erect, commonly much reduced : lower lip 3-lobed : middle lobe often 
notched. Stamens 4: anthers 2-celled ; sacs distinct, diverging. Nutlets smooth. 
Pedicel about as long as the calyx: Texas species. 1. M. pilosiuscula. 
Pedicel much longer than the calyx: Floridian species. 2. M. Browne. 
1. Micromeria pllosiüscula (Benth.) Small. Stems sparingly pubescent, branched 
at the base, the branches ascending or spreading, 1-2 dm. long : leaf-blades broadly ovate 
or orbicular, 5-10 mm. in diameter, undulate-crenate, truncate or cordate at the base, short- 
petioled : pedicels filiform, usually shorter than the subtending bracts: calyx hirsute, 4-5 
mm. long ; tube turbinate, slightly ribbed ; lobes ovate, the upper one often 2-3-toothed, 
barely 4 as long as tube: corolla 5 mm. long; tube considerably dilated, the upper lip 
broadly cuneate-obovate, notched at the apex. [M. Brownei var. pilosiuscula A. Gray.] 
In wet sandy soil, Texas and adjacent Mexico. Spring and summer. : 
2. Micromeria Brdwnei (Sw.) Benth. Stems glabrous or nearly so, branching at 
the base, the branches prostrate, creeping, 1-4 dm. long : leaf-blades suborbicular or broadly 
ovate, 5-12 mm. in diameter, undulate or crenulate, truncate or subcordate at base, short- 
petioled : pedicels filiform, as long as subtending bracts or longer: calyx glabrate, nar- 
rowly turbinate, 4-5 mm. long, fluted ; lobes triangular or ovate, barely j as long as tube, 
ciliolate : corolla 7-8 mm. long; tube funnelform, the upper lip ovate, sometimes retuse. 
On river banks or muddy shores, Florida. Summer. 
31. CLINOPODIUM L. 
Annual or perennial herbs, or shrubs, with branching stems. Leaves opposite : blades 
narrow or broad, entire or toothed. Flowers in sessile or peduncled axillary pugon 
Calyx glabrous or pubescent in the throat, 2-lipped : tube usually 13-ribbed, often swollen 
at the base: upper lip with 3 short lobes: lower lip of 2 longer lobes. Corolla ze 
passing the calyx, 2-lipped : tube rather abruptly dilated at the throat: upper lip erec | 
entire or notched: lower lip spreading, 3-lobed. Stamens 4: filaments all anther-bear 
ing: anthers 2-celled ; sacs awnless. Nutlets smooth. [Calamintha Moench.] Bast. 
Flowers in dense axillary clusters, accompanied by linear-filiform bracts. 1. C. vulgare. 
Flowers few or solitary in the axils of the leaves, with minute braets. 
Stems glabrous or minutely pubescent at the nodes. 2. C. glabrum. 
Corolla less than 10 mm. long. 3. €, glabellum. 
Corolla over 10 mm, long. 
Stems pubescent or puberulent. 
A. Plants shrubby: corolla over 10 mm. long. 
a. Leaf-blades entire: corolla over 25 mm. long. 4. C. coccineum. 
* Calyx less than 1.5 em. long: corolla 3-4 em. long. s 
