LABIATAE (MINT FAMILY) 429 



1. Dracocephalum parviflorum Nutt. Gen. 2: 35. 1818. Rather stout, 

 2-7 dm. high, somewhat pubescent: leaves lanceolate or oblong, petioled, 

 incisely dentate or the lower pinnatifid-incised ; the lower floral similar: flowers 

 numerous, in sessile glomerules crowded in a thick, terminal, leafy-bracted 

 head or spike interrupted at base; bracts pectinate-laciniate and the teeth 

 aristate: corolla bluish, slender, scarcely exceeding the calyx. Throughout 

 our range and extending eastward to the Atlantic States. 



7. GLECOMA L. GROUND IVY 



Low creeping herbs, with crenate orbicular or reniform leaves on long 

 petioles and flowers in small verticillate axillary clusters. Calyx 15-nerved, 

 oblique and unequally toothed. Corolla 2-lipped, the tube dilated above and 

 exserted. Anther-sacs divergent. Nutlets ovoid and smooth. 



1. Glecoma hederacea L. Sp. PI. 578. 1753. A pubescent perennial, with 

 creeping stems 2^1 dm. long: leaves 1-3 cm. in diameter, the petioles often 

 equaling or exceeding the leaves: flowers few in the clusters: corolla 2-3 times 

 as long as the calyx; the upper lip 2-lobed or emarginate; the broad middle 

 lobe of the lower lip emarginate: upper stamens much surpassing the lower. 

 [Nepeta hederacea (L.) Trev.] Sparingly introduced in our range, though 

 quite common in other states. 



8. PRUNELLA L. SELF-HEAL 



Perennial herbs with petioled leaves and the small purple flowers in crowded 

 leafy-bracteate heads or, spikes. Calyx 10-nerved, 2-lipped; the upper lip di- 

 lated and truncately 3-toothed ; the lower 2-cleft. Corolla strongly 2-lipped and 

 with dilated tube. Filaments forked, one point of the fork bearing a 2-celled 

 anther with divaricate cells. 



1. Prunella vulgaris L. Sp. PI. 600. 1753. Stems slender, decumbent- 

 ascending, 1-3 dm. long: leaves oblong-ovate, toothed, petioled below, sessile 

 above: flowers in dense, bracteate, capitate spikes; bracts broadly ovate- 

 orbicular, strongly ciliate, 2 under each verticil of the spike: corolla blue, 

 purple, or violet (rarely white), about twice as long as the calyx. Adventive 

 from Europe and widely distributed, but seemingly native on moist slopes 

 in the mountains. 



9. PHYSOSTEGIA Benth. FALSE DRAGON-HEAD 



Almost glabrous herbs, with lanceolate and callous denticulate or serrate 

 leaves; the upper ones sessile, the lowest tapering into a petiole, floral reduced 

 to bracts of the simple or panicled spikes. Corolla much longer than the 

 calyx, showy rose or flesh-color, often variegated. Anthers 4, on villous 

 filaments, the cells parallel. 



1. Physostegia parviflora Nutt. Benth. in DC. Prodr. 12: 434. 1848. 

 Stems rather slender, leafy, 3-6 dm. high: leaves lanceolate or ovate- 

 lanceolate, denticulate: spikes short, 3-10 cm. long: calyx short-campanulate, 

 inflated-globular in fruit and with short, mostly obtuse teeth: corolla about 

 12 mm. long. From Wyoming northward and westward. 



10. LEONURUS L. MOTHERWORT 



Tall herbs with dentate or incised leaves and small flowers in axillary ver- 

 ticils. Calyx turbinate, 5-nerved, and with 5 equal teeth which are at length 

 spiny-pointed and spreading. Corolla 2-lipped; the upper lip oblong and en- 

 tire; the lower 3-lobed, with the middle lobe obcordate. Stamens 4, ascend- 

 ing under the upper lip; anther cells parallel. Nutlets truncate and 3-angled. 



