98 Introduction to Botany. 



stamens J, included, inserted on the tube of the corolla. Style filiform, 

 long-exserted. Ovary 4-parted, but producing only 1-2 white, shining 

 nutlets. 



1. Onosmodium Carolinianum, DC. Shaggy False Gromwell. i to 3 

 feet high, beset with rough, spreading hairs. Leaves lanceolate or ovate-lanceo- 

 late, acute. Corolla pubescent outside, yellowish white. On prairies or in dry 

 fields. 



2. Onosmodium mdlle, Michx. (l^., mollis, s.oit.) SOFT-HAIRY FALSE CROM- 

 WELL. I to 2 feet high, pale, clothed with short, soft hairs. Leaves ovate-lanceo- 

 late, acute. On prairies. 



3. Onosmodium Virginianum, DC. Virginia False Gromwell. i to 2 

 feet high. Clothed with short, appressed, bristly hairs. Leaves oblong to oblong- 

 lanceolate, blunt, oblanceolate below, narrowing to a petiole. Corolla yellowish 

 white. On hillsides or banks or in dry thickets. 



VERBENACE.S:. Vervain Family. 



Herbs or shrubs, with mostly opposite or verticillate leaves. Flowers 

 somewhat 2-lipped, or regular, in spikes, racemes, cymes, or panicles. 

 Calyx 4-5-lobed or cleft. Corolla mostly with cylindric tube and 2- 

 lipped or 4-5-lobed and regular. Stamens 4, didynamous, or as many 

 as the lobes of the corolla, sometimes only 2, inserted on the tube of 

 the corolla. Ovary superior, mostly 2-4-celled, but not 4-lobed. Style 

 simple ; stigmas 1-2. Fruit separating at maturity into 2-4 nutlets. 



I. VERBENA. 



(Latin name for any sacred herb.) 



Herbs, with opposite leaves and flowers in terminal, simple, or pani- 

 cled spikes. Calyx tubular, 5-angled, or toothed. Corolla salver-form 

 or funnel-form, with spreading, 5-lobed limb. Stamens 4, didynainous, 

 or rarely 2, included. Ovary 4-celled with I ovule in each cavity. 

 Fruit splitting into 4 nutlets. 



1. Verbena Aubletia, L. Large-flowered Verbena. Perennial, t foot 

 high or less, soft pubescent or smoothish. Leaves ovate to ovate-oblong in out- 

 line, incisely lobed or toothed, or 3-cleft, the lobes dentate. Inflorescence capitate, 

 but becoming spicate. Bracts of the inflorescence shorter than, or hardly equaling, 

 the calyx. Calyx teeth slender, awl-shaped. Corolla reddish purple or lilac, rarely 

 white, about i inch long, and the limb \ inch or more in diameter. On prairies or 

 in open woods. 



2. Verbena bipinnatlflda, Nutt. (L., ii, twice ; pmnatus, feathered ; findere, to 

 cut.) Small-flowered Verbena. Perennials, producing suckers, erect, 6 to 



