40 DIDTNAMIA. ANGIOSFERMIA* 



Order IL— ANGIOSPERMIA. 



f Calix quinquijid, 



420. PHRYMA. L. 



Calix cylindric, upper lip longer, trifid; low- 

 er bidentate. Upper lip of the corolla emargi- 

 nate, lower much larger. Seed one. 



Spikes slender, terminal; flowers opposite, each Iribrac- 

 teate; calix reflected downwards in fruit. (Perisperm 

 none; embryon flat; radicle superior! cotyledones enfiar- 

 gin ate.) 



Species. 1. P. leptostachya. The only known species. 



421. VERBENA. L. (Vervain.) 



Calix 5'Cleft. Corolla funnelform, tube in- 

 curved, limb unequal, 5-lobed. Stamina 4, fer- 

 tile. Seeds 4. 



Generally herbaceous; flowers bracteate, alternate and 

 slenderly spiked, or rarely subcorymbose. 



Species. 1. V. Aubletia. Abundant in Louisiana, o. 

 spuria. Apparently a mere variety of V. ojicitialis and ve- 

 ly common in the suburbs of Philadelphia and through- 

 out the slate of Delaware. 4. hastata. Flowers deep 

 blue; leaves rarely if ever hastate. Of this species there 

 appears to be a very distinct variety near Philadelphia 

 which I shall distinguish by ihe n^me oT (i.*oblo?igifoUa, 

 having oblong-lanceolate deeply serrated leaves, merely 

 acute, and not acuminated; spikes filiform, paniculate; 

 flowers smaller, pale blue. May this be F. panieulata 

 of Lamark? but the flowers are not imbricated, nor in 

 the least corymbose, it appears to be equally remote 

 from V. diffusa of the same, but assuredly intermediate, 

 if not an hybrid betwixt V. hastata and V. urticifolia. It 

 has only occurred to me twice on the banks of the Dela- 

 ware. 5. panieulata. 6. iirticifoUa. 7- diffusa. 8. rugo. 

 aa. 9. caroUniana. 10. stricta. Hirsute and canescent; 

 stem erect, leaves subsess'le, oblong-ovate, obtuse and 

 serrate; spikes subcylindric, rigid. Hab. Abundant 

 throughout the north western territories. 



An American genus of about 20 species indigenous to 

 both hemispheres, with the .solitary exception of V- offici- 

 nUUs. ' '< 



