LABIATAE 159 



Plants ascending or procumbent. 

 Corolla W long. 5. V. hracteoaa. 



Corolla 6" or more long. 



Corolla reddish-purple. 6. V. Canadensis. 



Corolla bluish-purple. 7. V. hipinnatifida. 



1. V. urticaefolia L. Pubescent, 2°-5° high : leaves ovate-oblong, ser- 

 rate : spikes filiform, much elongated : flowers scattered. — Common in 

 fields and waste places. June-September. 



2. V. hastata L. Puberulent, 2°-6° high : leaves oblong-lanceolate, 

 serrate, sometimes 3-lobed : spikes slender, densely flowered. — Not un- 

 common in fields and waste places. May-September. 



3. V. angustifolia Michx. Slightly pubescent, 6'-2° high : leaves 

 somewhat toothed : spikes slender, densely flowered : flowers blue. — 

 Common in barrens throughout the southern part. June-September. 



4. V. striata Vent. Soft-pubesceut, 2°-4° high : leaves serrate : spikes 

 stout, closely flowered : flowers blue. — Abundant in fields and waste places. 

 June-September. 



5. V. biacteosa Michx. Eough-pubescent : leaves pinnately incised, 

 usually 3-parted : spikes dense and stout, with long bracts : flowers blue. 

 — Common in sandy soil and in waste places. April-September. 



6. V. Canadensis (L. ) Britton. Wild Vbkbena. Somewhat pubes 

 cent : leaves more or less pinnately parted and toothed, often 3-clett : 

 flowers showy, 6"-8" broad, in dense capitate spikes : bracts usually not 

 longer than the calyx. — Common on rocky prairies and in barrens through- 

 out the southwestern part. May-September. 



7. V. bipinnatifida Nntt. Eesembles the last but has smaller deeper 

 purple flowers, the leaves are more divided and the bracts often surpass 

 the calyx. — Found at Sheffield and Courtney as a waif. May-September. 



2. PHYLA Greene. 



Corolla somewhat 2-lipped, the lower lip 3-lobed, the upper notched. 



1. P. lanceolata (Michx.) Greene. Foq-feuit. Extensively creep- 

 ing, appressed-pubescent : leaves ovate to oblong-lanceolate, serrate above : 

 flowers in dense capitate spikes on peduncles exceeding the leaves. — Com- 

 mon in wet places. June-October. 



Family 108. LABIATAE B. Juss. 

 Aromatic herbs with square stems, opposite leaves and no stipules. 

 Divisions of calyx five, rarely four. Corolla gamopetalous, 4-5-lobed, 

 regular or 21ipped. Stamens four, or two. Ovary superior, 4-lobed, or 

 4-parted, each cell containing a single erect ovule. Style solitary, 

 2-lobed at the summit. Fruit of four 1-seeded nutlets. 



Corolla regular or nearly so. 



Flowers blue. 2. Isanthus. 



Flowers white ; fertile stamens tour. 19. Mentha. 



Flowers white ; fertile stamens two. 18. Lycopus. 



Corolla irregular. 



