Dicotyledones. 99 



18 inches high. Leaves i-2-pinnatifid into oblong or linear divisions. Spikes 

 solitary at the ends of the branches. Bracts of the inflorescence mostly exceeding 

 the calyx. Corolla bluish purple or Ulac, limb of the corolla less than 5 inch broad. 

 On open prairies. 



3. Verbena bracte6sa, Michx. (L., bractea, a thin plate.) Large-bracted 

 Vervain, Perennial. Stems 4-sided ; much branched from the base, the branches 

 decumbent or ascending, 6 to 15 inches long. Leaves wedge-lanceolate in outline, 

 short-petioled, cut-pinnatifid, or 3-cleft. Spikes dense, becoming 4 to 6 inches long, 

 with conspicuous bracts longer than the purple flowers. Corolla about \ inch long. 

 On prairies and in waste places. 



LABlATiQ. Mint Family. 



Aromatic herbs or shrubs, with opposite leaves and usually 4-sided 

 stems. Flowers chiefly in cynnose clusters, which are often aggregated 

 into spilces or racemes. Calyx mostly 5-toothed or lobed, persistent. 

 Corolla gamopetalous, mostly 2-lipped, the limb 4-5-lobed. Stamens 

 mostly 4 and didynamous, inserted on the tube of the corolla, some- 

 times only 2. Ovary superior and deeply 4-lobed, with i ovule in each 

 lobe. Fruit, 4 seedlike nutlets at the bottom of the persistent calyx. 



\. SCUTELLARIA. Skullcap. 



(L., scutella, a dish, alluding to calyx in fruit.) 



Bitter annual or perennial herbs. Flowers in spikelike racemes, blue 

 or violet. Calyx 2-lipped, the upper lip with a prominent protuberance. 

 Corolla 2-lipped, its tube long, ascending, and somewhat curved, dilated 

 in the throat ; the upper lip arched and the lower spreading or bent 

 downward. Stamens 4, all anther-bearing, didynamous, the lower 

 anthers but i -celled. Ovary 4-parted ; style unequally 2-cleft. Lips 

 of the calyx closed in fruit. 



1. Scutellaria serrata, Andrews. (L., serratus, notched like a saw.) Showy 

 Skullcap. Slender perennial, i to 2 feet Jiigh, nearly glabrous. Leaves ovate to 

 ovate-oblong, coarsely serrate or dentate. Flowers in terminal loose racemes. 

 Corolla blue, about i inch long, very minutely pubescent, the upper lip somewhat 

 shorter than the lower. In woods. 



2. Scutellaria pilosa, Michx. (L.,/«&i«J, hairy.) Hairy Skullcap. Peren- 

 nial, clothed with spreading hairs. Leaves ovate to oval or oblong, crenate or 

 coarsely serrate, i to 3 inches long, rather remote, the lower long-petioled. 

 Racemes short. Corolla blue, about \ inch long, the lower lip a little shorter than 

 the upper. In dry woods or thickets. 



3. Scutellaria Wrightii, Gray. (Latin genitive of proper name.) Resinous 

 Skullcap. Perennial from a woody root, 6 to 10 inches high. Minutely hairy 



