278 RYDBERG: SoME GENERIC SEGREGATIONS 
6. A. integrifolia (Wats.); JZ. albicaulis var. integrifolia 5.Wats. 
King’s Exp. 5: 114. 1871; JZ dispersa S. Wats. Proc. Am. 
Acad. 152-115. 1876. 
7. A. compacta (A. Nelson) ; JZ compacta A. Nels. Bull. Torrey 
Club, 25: 275. 18098. 
8. A. gracilenta (Torr. & Gray); M@. gracilenta Torr. & Gray, 
Fl. N. Am. 1: 534. 1840. 
g. A. affinis (Greene) ; JZ. affinis Greene, Pittonia, 2: 103. 1890. 
10. A. aurea (Lindl.); Bartonia aurea Lindl. Bot. Reg. 22: p/. 
1837. 1836. Not Mentzelia aurea Nutt. 1818; M. Lindleyt 
Torr. & Gray, Fl. N. Am. £: 533. 1840. 
11.“A. nitens (Greene); J/. mitens Greene, Fl. Francisc. 234. 
18Q1. 
12. A. Veatchiana (Kellogg); MZ Veatchiana Kellogg, Proc. Cal. 
Aid 2:90. 9863. OK 
13. A. pectinata (Kellogg); JZ jpectinata Kellogg, Proc. Cal. 
Acad. 3: 40. 1868. 
14. A. micrantha (Torr. & Gray); M. micrantha Torr. & Gray, 
Fl. N. Am. 1: 535. 1840. 
IV. A fourth segregation is proposed in Synthyris. Profes- 
sor Greene has included this genus in Wud/fenia and he has been 
followed by many American botanists. Wau/fenia, represented by 
European and Asiatic plants, has a 4-valved capsule, which is 
neither flattened nor emarginate at the apex, and a corolla with 
along 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. 
rentformis) 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. S. a/pina and 
its relatives, on the contrary, have an altogether different corolla, 
cleft to near the base into two distinct lips. .S. 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 corella. The 
related genera are distinguished as follows : 
