90 



SHORTER NOTES 



The Andropogon-Viola Uromyces. — A note has previously 

 been published in Torreya * on the probable identity of an 

 Aeciditnn on Viola and of the Uromyces andropogonis Tracy on 

 Andropogon virginicus L. This conclusion was reached after 

 repeated observations and inoculations had been made in the field. 

 Proof of their identity was obtained during the spring of 1909 by 

 inoculating violet leaves, under control conditions, with teleuto- 

 spores of the Uromyces. Seven days after the inoculations were 

 made, spermogonia began to show on the violet leaves, followed 

 by mature aecidia on the fifteenth day. 



In reply to a letter to Professor J. C. Arthur, concerning the 



nomenclature of the rust, he states that " Tracy published his 



Uromyces andropogonis in 1893, while Caeoma {Aecidiimi) peda- 



tatiim Schw. dates from 1832." This being the case, the name 



of the rust becomes Uromyces pedatatus (Schw.) n. comb. 



John L. Sheldon 

 West Virginia University, 



MORGANTOWN, WeST VIRGINIA 



A NEW Ponthieva from the Bahamas : Ponthieva Brit- 

 tonae sp. nov. 



Afif. P. racemosce (Walt.) Mohr, sed in floribus minor et in 

 racemo angiistior. Radices elongatae, flexuosa;, villosae. Folia 

 rosulata, oblongi-lanceolata vel oblanceolata, 4-10 cm. longa, 

 1.5—3.5 cm. lata, acuta ad basim in petiolum sulcatum 1—2.5 

 cm. longum contracta. Scapiis teres, gracilis 26.5—37 c"^- altus. 

 Bractece oblongse, acuminatae, acutae. Inflorescentia racemosa. 

 Racemus, floribus 20-35, 1-1.8 dm. longus, circa 2 cm. in diam- 

 etro, laxiflorus, pubescens. Bractece inflorescentiae oblongae, acu- 

 minatae, valde acutae, circa 5 mm. longae. Pedicelhis cum ovario 

 7—9 mm. longus. t Sepala lateralia ovato-lanceolata, 4 mm. 

 longa, 2 mm. lata. Sepalum dorsale oblongi-lanceolatum, obtusum. 

 Petala lanceolata pauci-nervia, obtusa, 4. 5 mm. longa. Labelhwi 

 sub-saccatum, 4.5 mm. longum, 3-lobatum ; lobi laterales rotun- 

 dati ; lobus medius oblongus, obtusus, i mm. longus, 0.5 mm. 

 latus. 



* Torreya 9: 54. 1909. 



f This measurement applies to open flowers. 



