Rydberg : Studies on the RctcKv Mountain Flora 688 



which enlarges somewhat in fruit but does not become membra- 

 nous : flowers in each involucre 3 : perianth open, short funnel- 

 form : stamens 3, distinct : fruit ellipsoid, neither angled nor ribbed, 

 very indistinctly tubercled, glabrous. 

 Only one species. 



I. AUioniella oxybaphoides (A. Gray) 



Oitauioclidion oxybaphoides A. Gray, Am. Journ. Sc. II. 15 : 

 320. 1853. 



Mirabilis oxybaphoides A. Gray, Bot. Mex. Bound. Surv. 173. 



1859. 



OxybapJius WrigJitii Yi<tms\. Biol. Cent. Am. 3:3. 1882. 



Allioina oxybaphoides Kuntze, Rev. Gen. 533. 1891. 



From the many synonyms can be seen that this species has 

 been moved from one genus to another. Most botanists have 

 regarded it as an Allionia {Oxybaphiis), which it resembles most in 

 general habit, the perianth and the number of stamens ; but it 

 lacks the most essential characters of that genus, viz., the ribbed 

 fruit and the membranous involucre. It is, therefore, more closely 

 related to the Mirabilis series ; and could be included in genus 

 Quainoelidion had it not the open AlIionia-\\\\& perianth, only three 

 stamens and a flat rotate involucre. It is, therefore, better to regard 

 it as the type of a new genus, intermediate between Allionia and 

 Quainoelidion. 



A. oxybaphoides grows from southern Colorado to western 

 Texas and Arizona ; also in northern Mexico. 



5. ALLIONIA Loefl. It. Hisp. 181. 1758 



Vitniania Turra; Cav. Ic. 3: 53. 1794- Not Vitniaiuua 

 Vahl. 1794. 



Oxybaphiis L'Her.; Willd. Sp. PI. i : 185. 1797. 



CalyxJiynienia Ortega, Nov. aut Rar. PI. Hort. Matr. 5. 1797. 



Calyvienia Pers. Syn. i : 36. 1805. 



The genus was based on a plant which a year later received 

 the specific name A. violaeea L. Vitniania and Oxybaphus were 

 both based on Mirabilis viseosa Cav.; CalyxJiynienia on C. glabri- 

 folia and Calynienia on six species without the type being desig- 

 nated. 



