LAMIACEAE 1039 



pubescent, the upper lip oblong-lanceolate, the lower lip 3-lobed, its middle lobe linear- 

 oblong, notched : filaments and style glabrous : nutlets about 1 mm. long. 



In dry woods and thickets, Massachusetts to Wisconsin, middle Georgia and Missouri. Summer. 



2. Blephilia hirsuta (Pursh) Torr. Stems hirsute or villous-hirsute, giving off 

 numerous runners with ovate leaf-blades in spring, 3-10 dm. tall : leaf-blades ovate to 

 lanceolate, 5-12 cm. long, acute or acuminate, serrate, rounded or subcordate at base : 

 heads about 2 cm. thick : calyx 6-8 mm. long ; tube delicately ribbed, the upper lip with 

 3 subulate bearded lobes, the lower lip with 2 lobes, their bases ovate, subulate-tipped : 

 corolla pale, about 1 cm. long, pubescent ; tube curved, the upper lip lanceolate, the lower 

 lip 3-lobed, its lateral lobes rounded, its middle lobe linear, usually notched : nutlets 1 

 mm. long. 



In shaded ground or copses, Vermont to Wisconsin, Georgia and Texas. Summer. 



25. HEDEOMA Pers. 



Annual or perennial herbs, usually strongly aromatic and pungent. Leaves opposite, 

 often small : blades entire or spai'ingly toothed. Flowers in remote or contiguous axillary 

 clusters. Calyx pubescent in the more or less constricted throat : tube 13-ribbed, com- 

 monly gibbous at the base, with 5 nearly equal lobes, or 2-lipped. Corolla blue or pur- 

 ple : tube but little enlarged below the lips : upper lip erect, entire to 2-lobed : lower lip 

 spreading, 3-lobed. Stamens 4, or usually only 2 fertile : filaments 4, 2 usually sterile, 

 much reduced or wanting. Nutlets smooth. 



Calyx strongly2-lipped, with the lobes of the two lips very dissimilar : filaments of posterior stamens 



manifest. ■ I. H. pulegioides. 



Calyx with similar or nearly similar lobes: filaments of posterior stamens rudi- 

 mentary or obsolete. 

 Calyx-lobes of both lips about equal in length. 



Calyx-lobes y^ as long as the tube : corolla about twice as long as the calyx. 2. H. acinaides. 

 Calyx-lobes J^ as long as the tube : corolla barely as long as the calyx. " 3. //. hispida. 



CAlyx-lobes of tlie 2 lips unequal in length, those of the lower much longer than 

 those of the upper. 

 Calyx-tube barely if at all swollen at the base. 4. H. Di-ummondii. 



Calyx-tube manifestly swollen at the base. 

 Calyx n-d mm. long. 



Leaf about equalling the calyx it subtends or surpassed by it. 



Bracts petioled : calyx coarsely pubescent. 5. H. serpyUifoUa. 



Bracts sessile : calyx finely pubescent. 6. H. nana. 



Leaf surpassing the calyx it subtends. 7. H. mncta. 



Calyx 7-8 mm. long. 



Stems or branches branched throughout : calyx minutely hispid. 8. JI. lata. 



Stems or branches simple above the base : calyx copiously bristly hispid. 9. H. Reverchonii. 



1. Hedeoma pulegioides (L. ) Pers. Annual, finely pubescent. Stems erect, 1-4 

 dm. tall, more or less bushy-branched : leaf-blades oval-elliptic or oblong, 1-2 cm. long, 

 obtuse, sparingly serrate : clusters loosely flowered, separated : calyx strongly ribbed, 3-4 

 mm. long; tube stout, gibbous at base, the three upper lobes triangular or triangular-ovate, 

 acute, the two lower lobes subulate, ciliate : corolla 4-5 ram. long ; lips nearly etpial, with 

 blunt teeth : filaments and style glabrous : nutlets oval, nearly 1 mm. long. 



In dry soil, Cape Breton Island to Ontario, Minnesota, Florida and Nebraska. Summer. 



2. Hedeoma acinoides Scheele. Annual, minutely pubescent. Stems erect, 1-2 

 dm. tall, or branched at the base, the branches ascending : leaf-blades oval to oblong, 1-1.5 

 cm. long, obtuse, slightly serrate or nearly entire : clusters aggregated into terminal 

 raceme-like panicles : calyx 5-6 mm. long, minutely pubescent, slightly enlarged at base 

 but not gibbous ; tube slender ; lobes nearly equal, subulate-lanceolate : corolla 7-8 mm. 

 long ; tube finely pubescent, nearly filiform, the upper lip oblong, usually minutely 

 notched at the apex, the lower lip 3-lobed, its middle lobe nearly oblong, notched, lateral 

 lobes ovate, rounded : filaments and style glabrous : nutlets 0.8 mm. long. 



On plains or prairies, Arkansas and Texas. Spring and summer. 



3. Hedeoma hispida Pursh. Annual, hirsute. Stems erect, 0.5-3 dm. tall, simple 

 or branching : leaf-blades linear, thickish, acutish, entire or nearly so, 1-3 cm. long, sessile 

 or very short-petioled : clusters numerous, contiguous or separated below : calyx hirsute, 

 4-5 mm. long, the three upper lobes linear-subulate, the lower lobes subulate, ciliate : 

 corolla about 7 mm. long, nearly glabrous ; tube gradually dilated, the upper lip sub- 

 orbicular, notched, the lower lip 3-lobed, the middle lobe nearly as broad as long, refuse : 

 filaments and style glabrous : nutlets oblong, 1 mm. long. 



On dry plains, Northwest Territory to Illinois, Louisiana and Colorado. Spring and summer. 



4. Hedeoma Drummondii Benth. Annual or perennial, minutely cinereous-pubes- 

 cent. Stems erect, or assurgent, often diffusely branched, 1-4 dm. long : leaf-blades linear, 

 oblong or oval at the base of the stem, thickish, 0.5-1 cm. long, obtuse, entire, sessile or 



