548 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
1. Echium vulgare L. Sp. Pl. 139. 1753. 
Tyre Locauty: “Habitat in Europa ad vias & agros.”’ 
New Mexico: Mesilla (Cockerell). 
A native of Europe, frequently established as a weed in the United States. 
124. VERBENACEAE. Vervain Family. 
Herbs or‘shrubs with opposite exstipulate leaves (sometimes apparently fascicled); 
flowers in elongated or contracted bracted spikes, these somewhat elongated in fruit; 
calyx limb 2 to 5-lobed, sometimes unequally so; corolla mostly 2-lipped, tubular, 
5-merous; stamens didynamous, epipetalous, alternate with the corolla lobes; style 
single, with 1 or 2 stigmas; ovary 2 to 4-celled; fruit dry, separating at maturity into 
2 or 4 nutlets. 
° KEY TO THE GENERA. 
Fruit of 4 nutlets........ 2.2.2.0... 020.220 e eee eee eee ee eee 1, VERBENA (p. 548). 
Fruit of 2 nutlets. 
Shrubs, aromatic; spikes elongated.................-.--- 2, Lirppia (p. 550). 
Herbs, odorless; spikes contracted, headlike............. 3. Puy a (p. 550). 
1. VERBENA L. VeErvVAtN. 
Annual or perennial herbs, erect or prostrate, with simple or pinnately lobed leaves 
and terminal bracted spikes of flowers; calyx. 5-toothed, sometimes unequally s0; 
corolla usually bluish or purple, with 5 unequal lobes; stamens 4, didynamous, the 
connective sometimes with a gland; ovary 4-celled, the stigma 2-lobed; fruit of 4 
nutlets separating at maturity, without a stylopodium. 
KEY TO THE SPECIES. 
Anthers of the upper stamens glandular-appendaged; flowers 
in depressed spikes; corollas conspicuous. . 
Calyx lobes shortly setaceous-tipped, nearly equal; bracts 
merely acute; plants erect; nutlets nearly smooth on 
the lower fourth; flowers rose purple.......-..--..-.-- L. V. wrightit. 
Calyx lobes with long setaceous tips, conspicuously unequal; 
bracts acute or long-acuminate; plants prostrate; nut- 
lets reticulate almost to the base; flowers rose or bluish 
purple. 
Segments of the leaves oblong-lanceolate, 3 to 4 mm. 
wide; flowers bluish purple; plants stout, oeca- 
sionally with some suberect stems...........---- 2. V. ambrosiaefolia, 
Segments of the leaves narrowly oblong-linear, 1 to 2 
mm. wide; flowers rose purple; plants lower and 
with slender stems.......................-..... 3. V. pubera. 
Anthers not glandular-appendaged; flowers in elongated spikes; 
corollas usually small; leaves simple or once pinnate. 
Bracts longer than the fruiting calyx; stems prostrate or 
erect. 
Plants prostrate, only the ends of the stems ascending. 4. V. bracteosa. 
Plants erect, all the stems rigidly upright............. 5. V. imbricata, 
Bracts shorter than the fruiting calyx; stems erect. 
Leaves not lobed; spikes dense. 
Fruiting calyx almost glabrous; plants sparingly 
hispid..............-.-2---.--------------- 6. V. hastata. 
Fruiting calyx appressed-hirsutulous; plants hispid- 
villous throughout.........-..-2.22-2.2-2--- 7. V. macdougalit, 
