LAMIACEAE. 247 



Flowers in terminal racemes or panicles. 

 Leaves with tootlied blades. 



Corolla over 2 cm. long, copiously pubescent : seeds 



about 1 mm. long. 2. 8. incana. 



Corolla less than 2 cm. long, glabrous or nearly so : 



seeds about 2 mm. long. 3. 8. pilosa. 



Leaves, at least those above the middle of the stem, 



with entire blades. 4. 8. intcgrifoUa. 



Flowers solitary in the axils of leaf-like bracts. 



Rootstock tuber-bearing : corolla less than 1.5 cm. 

 long, thrice as long as the calyx or less, the upper 

 lip much shorter than the lower. 5. 8. parvula. 



Rootstock not tuber-bearing : corolla over 1.5 cm. long, 

 several times as long as the calyx, the upper lip 

 about equalling the lower. G. 8. galenculata. 



Nutlets winged : fruit elevated on a slender gynobase. 7. 8. nervosa. 



1. S. lateriflora L. Plants erect or reclining, 2-10 dm. long, glabrous, or 

 puberulent above: leaf -blades thinnish, ovate to ovate-lanceolate, 2-6 cm. long, 

 coarsely serrate: calyx becoming 3-4 mm. long: corolla 6-7 mm. long: nutlets 

 about 1 mm. long. — Common, in moist soil. — Sum. — Mad-dog skullcap. 



2. S. incana Muhl. Plants 5-12 dm. tall, finely pubescent: leaf -blades 4-12 

 cm. long, serrate or crenate-serrate : calyx becoming 6-7 mm. long: corolla 

 15-20 mm. long; lower lip 6-8 mm. wide: nutlets 1.5 mm, long. — N. S. Not 

 very common, in thickets. — Sandatones and shales, schists. — Sum. 



3. S. pilosa Michx. Plants 1-6 dm. tall, finely pubescent: leaf -blades ovate, 

 oval, or deltoid-ovate, 1.5-4.5 cm. long, coarsely crenate : calyx becoming 

 about 5 mm. long: corolla 12-13 mm. long; lower lip 5-7 mm. wide: nutlets 1 

 mm. long. — • Common, in woods and meadows. — Sum. 



4. S. integrifolia L. Plants 2-6 dm. tall, softly pubescent: blades of the 

 lower leaves ovate to oblong-ovate, coarsely crenate, those of the upper ones 

 oblong to oblong-lanceolate or linear, entire: calyx becoming 6-7 mm. long: 

 corolla 21-25 mm. long; lower lip shallowly notched: nutlets fully 1 mm. 

 long. — Rather common, in pastures and thickets. — Early sum. 



5. S. parvula Michx. Plants 0.5-3 dm. tall, glabrous or minutely pubescent: 

 leaf-blades broadly ovate to lanceolate, 1-2 cm. long, shallowly toothed or 

 entire: calyx becoming 5-6 mm. long: corolla about 11 mm. long; lower lip 

 4-4.5 mm. wide : nutlets 1 mm. long. — M. S. Common, in dry soil. — Lime- 

 stones, quartzite, serpentine. — Early sum. 



6. S. galenculata L. Plants 2-9 dm. long, sometimes finely pubescent: leaf- 

 blades oblong-lanceolate to oblong, 2-6 cm. long, shallowly serrate: calyx be- 

 coming 6-7 mm. long: corolla 16-20 mm. long; lower lip about 5 mm, wide: 

 nutlets 1.5-2 mm. long. — Not very common, in swamps. — Sum. 



7. S. nervosa Pursh. Plants 1-4 dm. tall, minutely pubescent: leaf -blades 

 suborbicular to oval, or lanceolate above, 2-4 cm. long, undulate or coarsely 

 serrate: calyx becoming about 5 mm. long: corolla 9-12 mm. long, the lower 

 lip about 5 mm. wide : nutlets 1-2 mm. long. — M. Rare, in woods. — Sand- 

 stones and shales, limestones. — Early sum. 



5. SIDERITIS [Tourn.] L. Herbs or shrubs. Leaves opposite: blades 

 entire or toothed. Flowers in axillary cymes. Calyx slightly 2-lipped: tube 

 5-10-ribbed: lobes spine-tipped, the middle one of the upper lip usually 

 broader than the others. Corolla yellow, white, or pink, slightly longer than 

 the calyx, 2-lipped: upper lip entire or lobed: lower lip longer, with a broad 

 middle lobe. Nutlets obovoid. 



1. S. romana L. Annual, softly pubescent, the stem and branches 0.5-3 dm. 

 tall: leaf -blades obovate to oblong, 1-3 cm. long, crenate, sessile or nearly so: 

 calyx 7-9 mm. long; lobes shorter than the tube, the middle one of the upper 



