1919.] NATURAL SCIENCES OF PHILADELPHIA. 231 



VI. ANGELONIE^. 23. Angelonia. 



VII. ANTIRRHINE.E. 



Plants glabrous. Flowering stems erect. Leaves linear, only 

 the uppermost small ones with axillary flowers. Pedicels 

 not over 10 mm. long. 24, Linaria. 



Plants hirsute. Flowering stems prostrate. Leaves ovate to 

 orbicular, nearly all with axillary flowers. Pedicels over 

 10 mm. long. 25. Kickxia. 



VIII. VERONICE^. 



Leaves whorled. Corolla white, its lobes shorter than the tube. 

 Capsule acute, longer than broad, not flattened. Plant 

 10-20 dm. tall. 26. Veronicastrum. 



Leaves opposite or alternate. Corolla blue or white, its lobes 

 longer than the tube. Capsule acute to deeply notched, 

 broader than long, flattened. Plants lower. 



27. Veronica. 



IX. BUCHNERE.E. 



Corolla not blue, with open orifice. Stamens all with anthers 

 two-celled, lanate. Filaments and style nearly as long as 

 or longer than the tube of the corolla. Capsule exserted 

 from the caljrx-tube. Pedicels not bracted. 

 Corolla tubular, orange, with thickened base, fleshy, semi- 

 persistent, shriveling and blackening before falling. 

 Filaments equal, long-exserted, pubescent with beaded 

 hairs. Anther-sacs closely parallel, 6-7 mm. long. Pedi- 

 cels deflexed in fruit. 28. Macranthera. 

 .Corolla with inflated throat and spreading lobes, yellow or 

 pink, membranous, soon falling. Filaments not long- 

 exserted, pubescence not beaded. Anther-sacs less than 

 5 mm. long. Pedicels erect or permanently spreading. 

 Anther-sacs glabrous or with a few bristle-like hairs at 

 apex. Stigma short, punctiform or capitate. Fila- 

 ments dilated-flattened and pubescent. Corolla yel- 

 low. 

 Corolla densely pubescent within on all sides, its lobes 

 all distinct and slightly shorter than the tube. 

 Filaments clearly didynamous, dilated and pubes- 

 cent throughout. Anther-sacs each opening by a 

 slit its entire length. Style short, thick, more or 

 less bilobed, persistent and reflexed on the capsule. 

 Pedicels 1-2 mm. long. Plant stout, 15-20 dm. 

 tall, the leaves 10-30 cm. long. 29. Dasistoma. 

 Corolla slightly pubescent within (in a ring about the 

 base of the filaments and below posterior sinus), its 

 lobes longer than the tube, the two posterior united 

 nearly one-half their length. Filaments nearly 

 equal, dilated and pubescent at base. Anther-sacs 

 each opening by a slit one -sixth to one-fourth its 

 length. Style long, slender, entire, deciduous, 



