278 Rydberg : Some Generic Segregations 



6. A. integrifolia (Wats.) ; M. albicaulis var. integrifolia S.Wats. 

 King's Exp. 5 : 114. 1871;^ dispersa S. Wats. Proc. Am. 

 Acad. II : 115. 1876. 



7. A. compacta (A. Nelson) ; M. compacta A.Nels. Bull. Torrey 

 Club, 25 : 275. 1898. 



8. A. gracilenta (Torr. & Gray) ; M. gracilenta Torr. & Gray, 

 Fl. N. Am. I : 534. 1840. 



9. A. affinis (Greene) ; M. affinis Greene, Pittonia, 2 : 103. 1890. 



10. A. aurea (Lindl.) ; Bartonia aiirea Lindl. Bot. Reg. 22 : //. 

 1831. 1836. Not Mentzelia mirea Nutt. 1818 ; M, Lindleyi 

 Torr. & Gray, Fl. N. Am. i : 533. 1840. 



11. A. nitens (Greene); M. nitens Greene, Fl. Francisc. 234. 

 1891. 



12. A. Veatchiana;(Kellogg) ; M. f^'rt/r/!/^;/^ Kellogg, Proc. Cal. 

 Acad. 2 : 99. 1863. 



13. A. pectinata (Kellogg); M. pectinata Kellogg, Proc. Cal. 

 Acad. 3 : 40. 1868. 



1 4. A. micrantha (Torr. & Gray) ; M. viicrantha Torr. & Gray, 

 Fl. N. Am. I : 535. 1840. 



IV. A fourth segregation is proposed in Syntliyris. Profes- 

 sor Greene has included this genus in Wnlfenia and he has been 

 followed by many American botanists. Wtilfenia, represented by 

 European and Asiatic plants, has a 4-valved capsule, which is 

 neither flattened nor emarginate at the apex, and a corolla with 

 a long tube. All the American species have flattened capsules, 

 which are 2-valved and obcordate at the apex. In this respect 

 they agree perfectly with Veronica. The original Synthyris (S. 

 reniformis) and a few related species have a corolla that is built 

 exactly on the same plan as that of Veronica, and it is only the 

 general habit that keeps them out of that genus. 6". alpina and 

 its relatives, on the contrary, have an altogether different corolla, 

 cleft to near the base into two distinct lips. 5. rubra and its allies 

 have no corollas but agree otherwise both in general appearance 

 and structure of the flower and fruit with S, alpina. It would 

 however hardly be advisable to place them in different genera 

 merely on account of the presence or absence of the corolla. The 

 related genera are distinguished as follows : 



