688 RypBERG: STUDIES ON THE Rocky MounTaiIn FLorRA 
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. 
“1. Allioniella oxybaphoides (A. Gray) 
Quamoclidion oxybaphoides A. Gray, Am. Journ. Sc. I. 15: 
320. 1853. 
Mirabilis oxybaphoides A. Gray, Bot. Mex. Bound. Surv. 173. 
18509. 
Oxybaphus Wrightii Hemsl. Biol. Cent. Am. 3: 3. 1882. 
Allionia 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 A//onia (Oxybaphus), 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 
Quamoclhidion had it not the open A/lonia-like 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 
Quamoclidion, 
A. oxybaphoides grows from southern Colorado to western 
Texas and Arizona; also in northern Mexico. 
5. ALLIONIA Loefl. It. Hisp. 181. 1758 
Vitmania Turra; Cav. Ic. 3: 53. 1794. Not Vitmanma 
Vahl. 1794. 
Oxybaphus 1 Her.; Willd. Sp. Pl. 1: 185. 1797. 
Calyxhymenia Ortega, Nov. aut Rar. Pl. Hort. Matr. 5. 17 of: 
Calymenia Pers. Syn. 1: 36. 1805. 
The genus was based on a plant which a year later received 
: the specific name A. violacea L. Vitmania and Oxybaphus were 
__ both based on Mirabilis viscosa Cav.; Calyxhymenia on C. agit 
_ folia and Calymenia on six species without the type being desig 
