THE AMERICAN MIDLAND NATURALIST 93 
PANETOS Raf. 
Houstonia rotundifolia Michx.' has been segregated from 
Houstoma by Rafinesque under the name Panetos. Considering 
in addition to the characters given by that author also that of 
producing numerous cleistogamous flowers a rather unusual 
thing in this group the genus merits consideration for segregation. 
Panetos rotundifolius (Michx.) Nwd. 
Houstonia rotundifolia Michx., Fl. Bor. Am., I, 85 (1803). 
There are other Mexican and southern members of the genus 
Houstonia that ought to be separated from this aggregate, having 
flower and habit characters even more notable than those here 
referred to. 
ARONIA MED. A HOMONYM. 
On a number of occasions attention was called to the fact 
that several of Mitchell’s names antedated others now commonly 
held. The publication of Aronia? by that author is earlier than 
than of Medicus’ or Persoon. 
The Aronia of Mitchell is Orontium of Linnaeus and though 
it can not be used as a valid name itself, its previous use renders 
any subsequent application of the name invalid, whether its 
first application is admissable or not, according to the rules of the 
codes. Even if it had a different meaning and origin in deviation 
it still is exactly identical in sound and spelling.4 It is therefore 
impossible to quibble about the matter for this reason. I have 
been unable to find that any other name is available as an alter- 
native application. Before the plant was admitted as segregated 
validly by some, a subgenus or section name was applied by Decan- 
dolle, and this may serve as a substitute for the Aronia antedated. 
ADENORACHIS (DC) Nwd. Nom. Nov. \ 
Aronia Medicus, Phil. Bot., 140 (1789), also Persoon, Syn 
II, 39 (1807) not Aronia Mitchell, Diss., App. 1, (1769) =Orontium 
uate wAn. Gene sca bhys. 1s ic: 
* Mitchell, J., Diss. Brevis de Princ. Bot. et Zool., App. aliquot de 
Pl. Virg. Obs., Norimb., Imp. Wulfgangii and Schwarzkopfii MDCCLXIX. 
(See Pritzel No. 6975). 
3 Persoon, C. H., Syn. II, 39, (1807), Medicus, F. K., Phil. Bot. I, 
140 (1789). 
4 N. L. Britton, III, Flora, II, 290 (1913), Kuntze, O., Rev. Gen. Pl., 
II, 720 (1891). 
