276 Rydberg : Some Generic Segregations 



TouTEREA Eaton & Wright, N. Am. Bot. 454. 1840 



Bartonia Sims, Bot. Mag.//. 148J. 1804. Not Muhl. 1801. 



lorrcya Eat. Man. Ed. 7. 560. 1836. Not Raf. 18 18. 



Hesperaster Qoz\s.&xqW., Torreya, i: 142. 1901. 



This genus contains nearly all the large-flowered species in- 

 cluded in Mentzelia. The outer filaments are more or less dilated ; 

 in most they are without anthers and in some as large as and 

 resembling the petals. These species are often described as hav- 

 ing ten petals. The genus Toiiterea was based on the first two 

 species mentioned below ; Bartonia Sims on Bartonia decapetala 

 and the type of Hesperaster is the same. As far as I know, the 

 following species belong here : 



1. T. decapetala (Pursh) ; Bartonia decapetala Pursh, Bot. Mag. 

 pi. i^Sy. 1812; B. ornata Pursh, Fl. Am. Sept. 327. 1814; 

 lonterea ornata Eat. & Wright, N. Am. Bot. 454. 1840; M. 

 ornata Torr. & Gray, Fl. N. Am. i: 534. 1840. 



2. T. NUDA (Pursh) Eat. & Wright, N. Am. Bot. 454. 1840; 

 Bartonia nnda Pursh, Fl. Am. Sept. 328. 1814 ; M. nuda Torr. 

 & Gray, 1. c. 



3. T. laevicaulis (Dougl.) ; Bartonia laevicanlis Dougl. ; Hook. 

 Fl. Bor. Am. i: 221. 1833; M. laevicanlis Torr. & Gray, 

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



4. T. Brandegei (S. Wats.) ; Af. Brandegei S. Wats. Proc. Am. 

 Acad. 20 : 367. 1885. 



5. T. parviflora (Dougl.) ; B. parviflora Dougl. ; Hook. Fl. Bor. 

 Am. I : 221. 1833. 



6. T. pterosperma (Eastw.); M. pterosperma Eastw. Proc. Cal. 

 Acad. II. 6 : 290. 1896. 



7. T. stricta Osterhout Mss. ; Hesperaster strictiis Osterhout, 

 Bull. Torrey Club, 29: 174, 1902. 



8. T. Rusbyi (Wooton) ; Mentzelia Rusbyi Wooton, Bull. Torrey 

 Club, 25 : 261. 1898. 



9. T. Wrightii (A. Gray) ; M. Wrightii A. Gray, PI. Fendl. 48. 

 1848. 



10. T. speciosa Osterhout Mss.; M. speciosa Osterh. Bull. Torrey 

 Club, 28: 689. 1901 ; M. anrea Osterh. Bull. Torrey Club, 

 28:644. 1901. Not Nutt. 1818. 



