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 rigidus (Bart.) Small. vStems 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 longer 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. pilosiiiscula. 



Pedicel much longer than the calyx : Floridian species. 2. M. Brownei. 



1. Micromeria pilosiiiscula ( 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 j as long as tube : corolla 5 mm. long ; tube considerably dilated, the upper lip 

 broadly cuneate-obovate, notched at the apex. [il/. Brownei var. jnlosiuscula A. Gray.] 



In wet sandy soil, Texas and adjacent Mexico. Spring and summer. 



2. Micromeria Brownei (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 i as long as tube, 

 cilioiate : corolla 7-8 mm. long ; tube funnelform, the upper lip ovate, sometimes refuse. 



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 clusters. 

 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 sur- 

 passing the calyx, 2-lipped : tube rather abruptly dilated at the throat : upper lip erect, 

 entire or notched : lower lip spreading, 3-lobed. Stamens 4 : filaments all anther-bear- 

 ing : anthers 2-celled ; sacs awnless. Nutlets smooth. [Calamintha Moench.'] Basil. 



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 bracts. 

 Stems glabrous or minutely pubescent at the nodes. 



Corolla less than 10 mm. long. 2. C. glnbnnn. 



Corolla over 10 mm. long. 3. C. glabellum. 



Stems pubescent or puberulent. 



A. Plants shrubby : corolla over 10 mm. long. 



a. Leaf-blades entire : corolla over 25 mm. long. 



* Calyx less than 1.5 cm. long : corolla 3-4 cm. long. 4. C. coccineum. 



