RyDBERG : STUDIES ON THE Rocky Mounrain Fiora 687 
Involucre 5—6-flowered : perianth elongated funnelform. I. QO. multifiorum. 
Involucre 1-flowered : perianth open-campanulate. 2. Q. laeve. 
1. QUAMOCLIDION MULTIFLORUM Torr.; Gray, Am. Journ. Sc. II. 
153325. = 3654 
Oxybaphus multiflorum Torr. Ann. Lyc. N. Y. 2: 237. 1828. 
Nyctaginia Torreyana Choisy; DC. Prod. 137: 430. 1849. 
Mirabilis multifiora A. Gray; Torr. Bot. Mex. Bound. 173. 
1859. 
Choisy, who had not seen any specimens of this species and 
who believed that it had distinct bracts, referred it to Nyctaginia ; 
but it is evidently congeneric with and closely related to Mirabilis 
trifora Benth., the type of Quamoclidion. Q. multiflorum ranges 
from Colorado and New Mexico to Arizona and California. 
2. Quamoclidion laeve (Benth.) 
Oxybaphus laevis Benth. Bot. Sulph. 44. 1844. 
O. glabrifolius var. crassifolius Choisy ; DC. Prod. 137: 431. 
= 1849. 
O. glabrifolius Torrey, Pac. R. R. Rep. 4: 131. 1857. Not 
Vahl. : 
Mirabilis Californica A. Gray ; Torr. Mex. Bound. Surv. 173. 
1859. 
O. Californicus Benth. & Hook. Gen. 3: 4. 1880. 
This species has quite often been included in Oxybaphus, 2. e., 
Allionia, and often in Mirabilis. Professor Heimer, in his treat- 
Ment of the Nyctaginiaceae in Die natiirlichen Lflanzenfamilien, 
Merges Oxybaphus into Mirabilis ; but associates this species with 
the one-flowered species of A/lonia. 
It is evident that if A//onia is to be treated as a distinct genus, 
| QO. laeve can not be included in the latter genus for it lacks the es- 
- Sential characters viz., the ribbed fruit and the enlarging and mem- 
_branous hie alukre: It is evidently closer related to Quamoclidion 
than any other genus. The only important difference between it 
and the typical species is the open short perianth and the flowers 
Solitary within each involucre. The species ranges from Utah 
to Arizona and California. 
4. Allioniella gen. nov. 
Bracts five, united into a gamophyllous viscid rotate involucre, 
