692 RypBperG: STUDIES ON THE Rocky MountTAIN FLORA 
blades glabrous, thickish, linear to linear-lanceolate, acute, 5-10 
em. long: involucres numerous, in terminal cymes about 1.5 cm. 
wide, cleft below the middle into elliptical or oval obtuse lobes: 
perianth pink, about 8 mm. wide: fruit oblong-obovoid, slightly 
compressed, bluntly angled and not strongly tubercled, strigose. 
Perhaps closest related to A. /nearis, but distinguished by 
the thinner divergent leaves, the form of the involucre and the 
fruit. 
Cotorapo: Durango, 1898, Baker, Earle & Tracy, 512 (type 
in herb. N. Y. Bot. Garden). 
Arizona: Bakers Butte, Mogollon Mountains, 1887, Mearns, 
253. 
11, ALLIONIA AGGREGATA (Ortega) Spreng. Syst. 1: 384. 1825 
Calyxhymenia aggregata Ortega, Nov. aut Rar. Pl. 8: 7. re ee 
1798 (or 1799?). 
Oxybaphus aggregatus Vahl, Enum. 2: 41, in part. 1806. 
This is not the plant named O. aggregatus by Torrey, Watson 
and others, from Arizona and northern Mexico, but one that is 
closely related to A. hirsuta and generally has been confused with 
it. It differs mainly in the axillary solitary peduncles and in this 
respect is analogous to 4. Bodinii. Vahl evidently had two plants 
confused, citing as synonyms Calyxhymenia aggregata Ortega and 
Mirabilis aggregata Cavanilles, both illustrated and closely related 
species of Allionia. Ortega’s plant, which was the first published,” 
_ is densely hirsute, while Cavanilles’ plant is glabrous. Vahl, in 
his diagnosis, describes it as glabrous but remarks in parentheses 
“according to Ortega hirsute.”’ 
; A. aggregata grows in dry soil from Wisconsin to Texas and © 
New Mexico, also in northern Mexico. 
12, ALLIONIA DECUMBENS (Nutt.) Spreng. Syst. 1: 384. 1825 
Mirabilis aggregata Cav. Ic. 5: 22. pl. 437. 1799. 
Oxybaphus aggregatus Vahl, /. c. in part. 
Calymenia decumbens Nutt. Gen. 1: 26. 1818. 
Oxybaphus decumbens Sweet, Hort. Brit. 1: 334. 1826. 
o _ *I have not been able to find the exact date of Ortega’s fascicle in which the ae ee 
_ Scription appears. The ten fascicles were published in 1797-1800 ; but Cavanilles cites 
| - Ortega, which indicates that the latter’s description was published first. 
