1028 LAMIACEAE 



pedicels very short : bracts ovate to reniform-ovate, acuminate : calyx 4-5 mm. long, 

 puberulent ; tube campanulate ; lobes triangular, acute, barely as long as tube : corolla 

 puberulent, 10-12 mm. long ; tube much dilated upward, the upper lip nearly erect, un- 

 dulate, the lower lip spreading, the middle lobe about twice as long as the lateral ones : 

 nutlets 2 mm. long, sharply angled. 



In low barrens, Kentucky to Arkansas, Louisiana and Texas. Spring. 



2. Physostegia veroniciformia Small. Stems erect, 5-7 dm. tall, relatively stout, 

 simple, leafy to the inflorescence or near it : leaves several ; blades various, the lower 

 lanceolate to oblong-lanceolate, 5-8 cm. long, narrowed into stout petiole-like bases, the 

 upper blades sessile, narrowly fiddle-shaped or lanceolate, mostly longer than the lower, 

 sessile, all undulate or crenate-undulate, acute : racemes simple, few-flowered : calyx be- 

 coming 8-9 mm. long : tube tubular ; lobes triangular or lanceolate-triangular, acute : 

 corolla about 1.5 cm. long. 



In low grounds, Georgia. Summer. 



3. Physostegia leptophylla Small. Stems erect or ascending, 6-10 dm. long, sim- 

 ple, regularly leafy to near the raceme, rather slender : leaves few ; blades thin, oblong or 

 some slightly broadest above or below the middle, obtuse or acute above, repand, narrowed 

 into margined petiole-like bases : racemes 1-3 dm. long, slender, remotely flowered : pedi- 

 cels 1-3 mm. long, often as long as the bracts at maturity : calyx 5-6.5 mm. long ; tube 

 turbinate or campanulate in age, accrescent, somewhat inflated at maturity, faintly ribbed, 

 much longer than the pedicel ; lobes triangular to lanceolate, acute or acuminate, about 

 as long as the tube : corolla blue, about 2 cm. long ; tube rather abruptly dilated just 

 beyond the calyx, especially dilated beneath the lips, about one-third as long as the tube : 

 nutlets suborbicular, 3-3.5 mm. long, with sharp edges. 



On river shores, peninsular Florida. Spring to fall. 



4. Physostegia denticulata (Ait. ) Britton. Stems slender, erect or ascending, 3-9 

 dm. tall, sometimes branched : leaves few ; blades spatulate to oblong, repand-crenate, 

 obtuse, the lower ones with petiole-like bases, the upper sessile : racemes spike-like, 3-15 

 cin. long, interrupted, puberulent: bracts ovate or elliptic-ovate, acuminate: calyx 9-11 

 cm. long ; tube nearly cylindric ; lobes triangular, acute or slightly acuminate, about as 

 long as the tube: corolla bright pink, 2-2.5 cm. long, the lower lip broader than long, 

 entire, the upper lip with a notched terminal lobe : nutlets 2 mm. long, the angles mar- 

 gined. 



In swamps, Virginia to Florida and Texas. Summer and fall. 



5. Physostegia Digitalis Small. Stems erect, 7-12 dm. long, stout, sharply angled : 

 leaves several ; blades oblong to elliptic-oblong, 10-22 cm. long, acute or acutish, undulate 

 or repand-serrate above the middle, sessile and partly clasping at the base : racemes simple 

 or compound, finely pubescent : bracts lanceolate or ovate-lanceolate, 4-6 mm. long : pedi- 

 cels very short : calyx 8-10 mm. long ; tube turbinate or cylindnoturbinate ; lobes lanceo- 

 late, acuminate, about as long as the tube : corolla barely puberulent along the back, 

 2-2.5 cm. long, the lower lip spreading, the lobes oblong, its middle one emarginate, about 

 twice as large as the others, the upper lip slightly undulate. 



In low grounds, Missouri and Arkansas to Louisiana and Texas. Summer and fall. 



6. Fhysostegia Virginiana (L. ) Benth. Stems erect or trailing, 3-15 dm. long, 

 simple or sparingly branched : leaves several or many ; blades narrowly or linear-oblong 

 or oblong-lanceolate near top of stem, acute, serrate or incised-serrate, at least above the 

 middle, narrowed at the base, sessile : racemes spike-like, simple or compound : pedicel 

 much shorter than the calyx : bracts lanceolate or ovate-lanceolate : calyx glabrous or 

 nearly so, 6-8 mm. long ; tube cylindric ; lobes lanceolate or ovate-lanceolate, acute or 

 somewhat acuminate, more or less spreading, ^ as long as the tube : corolla bright pink. 

 2.5-3 cm. long, the lower lip irregularly denticulate, the upper lip with 3 lobes notched 

 and apiculate in each notch : nutlets 3 mm. long, sharply angled. 



In swamps and low grounds, Quebec to the Northwest Territory, Florida and Texas. Summer. 



15. SYNANDRA Nutt. 



Annual or biennial caulescent herbs, with pubescent foliage. Leaves opposite : blades 

 broad, toothed, petioled. Flowers in terminal interrupted racemes, often disposed in 

 panicles. Calyx campanulate : tube somewhat inflated at maturity : lobes 4, narrow, the 

 lower longer than the upper. Corolla white, 2-lipped : tube dilated above : upper lip 

 arched, entire : lower lip spreading with 2 lateral lobes and a larger middle lobe. Stamens 

 4 : filaments all anther-bearing, pubescent, but the upper pair contiguous and their 

 anthers connate, sterile : anthers glabrous ; sacs divergent. Nutlets angled, smooth. 



