1921] NATURAL SCIENCES OF PHILADELPHIA. 465 



lost). Capsule one-celled at maturity (by loss of 



septum distally, the placentae being short), globose, 



1 mm. long. Plant repent. 10. Glohifera. 



Leaves bipinnatifid. Seeds pale greenish-yellow, ridged, with 



faint transverse lines. Corolla lavender. Pedicel not 



bracteolate. Plant erect. 11. Leucospora. 



II. MiMULEAE. 



12. Mimulus. 



III. Verbasceae. 



13. Verbascmn. 



IV. Leucophylleae. 



14. Leucophyllum. 

 V. Cheloneae. 



Seeds angled, maturing many to a cell. Corolla-lobes uni- 

 formly colored, shorter than the tube which is not pouched 

 at base posteriorly. Posterior filament a conspicuous pro- 

 cess. Sepals nearly or quite distinct. Inflorescence com- 

 pound. Plants perennial, stiff, 3-20 dm. tall. 

 Corolla 15-.50 mm. long, red, blue, or white, its three ante- 

 rior lobes projecting or slightly recurving. Sterile filament 

 • elongate, slender, white. Sepals 3-13 mm. long. Seeds 

 irregularly polyedral. Inflorescence a thyrsus or relatively 

 narrow panicle. Cauline leaves sessile, mostly clasping. 

 Stem terete. 15. Penstemon. 



Corolla 6-12 mm. long, red-brown, its antero-lateral lobes 

 vertically projecting and its anterior lobe deflexecl. 

 Sterile filament wider than long, two-lobed, yellow or 

 brown. Sepals 2.5-3 mm. long. Seeds oblong, ridged. 

 Inflorescence a panicle. Cauline leaves petioled. Stem 

 quadrangular. 16. Scwphularia. 



Seeds rounded, smooth, maturing one to each ceil. Anterior 

 corolla-lobes blue, the posterior white, all longer than the 

 tube which is strongly pouched at base posteriorly. Poste- 

 rior filament a crescentic scarcely raised process. Sepals 

 united over one third length, enclosing over half the capsule. 

 Inflorescence racemose, often several flowers to an axil. 

 Plant annual, lax, 1-3 dm. tall. 17. Collinsia. 

 VI. Antirrhineae. 



Corolla broad (10 mm. wide), blue, with prominent yellow 

 palate, its tube saccate at base anteriorly. Sepals 8-10 mm. 

 long. Leaves petioled, the blade triangular, hastate with 

 broad lobes. Stems elongate, twining. 



18. Maurandya. 

 Corolla narrow, yellow or blue, its tube with a conspicuous 

 spur at base anteriorly. Sepals 3 mm. long. Leaves 

 sessile, linear. Stems erect. 19. Linaria. 



