44 JOURNAL OF THE ARNOLD ARBORETUM [vol. ii 



This form difTcrs from the type in the larger heaves wliich are up to 8 

 cm. long and '3.5 cm. wide in Drummond's specimen of which we re- 

 ceived excellent photographs through the kindness of Dr. Train; in Cock's 

 No. 3383 they attain cm. in length and 4 cm. in width. Palmer's Texas 

 sjiccimens came according to his notes from slender trees from 5 to 7 m. 

 talk The form with large leaves described as A. arhidijolia var. Baenit- 

 ziana Schneider probably belongs to A, floribunda^ as its fruit is fully 

 ripe in August. 



Siorhus arhutiJoUa var. xanthocarpa Hedlund {Mespilus xanihocarpa 

 Loddiges ^) and S. arhutifolia var. leiicocarpa Iledlnnd {Pyriis arhutijolia 

 7 alba Willdcnow) are unknown to me, and there is no reliable record in 

 literature of forms with yellow or white fruit. Forms with large fruits 

 have been named .1. arbulifoiia f. macrocarpa Zabel (in Beissner, Schelle 

 & Zabcl, llandb. Laubholz-Ben. 192 [1903], nomen). 



Aroma floribunda S})ach. Hist. Veg. ii. 89 (1834). — Pijrvs floribunda 

 Lindley in Bot. Keg. XII. t. lOOG (182G) ; Trans, llort. Soc. VII. 249 (1827?) - 

 ? Pyrus inclanocarpa jS siibpiibescens Lindlcy, 1. c. (1827.^). — Sorbus 

 floribunda Ileynhold, Nomencl. Bot. 773 (1810). — ? Sorbiis indanocarpa 

 /3 subpubcscen,'^ Ileynhold, 1. c. (1840), — ? Aronia nigra b. pubescem^ 

 Dippel, Ilandb. I.aubholzk. ill. 386 (1893), pro parte. — Pynis arbniijolia 

 var. viehuiocarpa f. piibe.scens Rand & Redfield, Fl. Mt. Desert, 98 (1894). 

 Aronia afropurpurca IJritton, Man. 517 (1901). — Britton & Brown, 

 Ilk Fl. ed. 2, Ti. 291, f]g. 2327 (1913). — Nash in Addi-onia iii. 1, t. 81 

 (1918). — Sorbus arbutifolia var. atropurpurca Schneider, 111. Ilandb. Laub- 

 holzk. I. G98 (1900). — Aronia arbutifolia var. atropurpurca Schneider in 

 Fedde, Rep. Sp. Nov. iil. 150 (1906). — Pyrus arbutifolia var. atropur- 

 purca Robinson in Rhodora, x. 33 (1908). — Adcnorhachis atropurpurca 

 Nieuwland in Am. Midi. Nat. I v. 94 (1915). — Pyrus atropurpurca Bailey 

 in Rhodora, xviii. 154 (1916). — Pyrus mclanocarpa var. afropurpurca Far- 

 well in Rep. Mich. Acad. Sci. xix. 258 (1917). 



This species is intermediate in its characters between A. arbutifolia and 



A. mclanocarpa Klliott, resembling in its pubescence Ihe first sj)ecies and in 

 its fruit the second. Therefore A. florihiinda has been considered by some 

 botanists, first apparently by Koeline (Deutsch. Dcndr. 254 [1893]), a hy- 

 brid between these two species, but its wide distribution from Newfound- 

 kind or Nova Scotia to Florida and west to Michigan and Indiana and its 

 occurrence in regions where only one or neither of the parents grow, is not 

 in favor of this theory, thougli possibly hybrid forms occasionally occur 

 which it seems impossible to distinguish from this species, 



* Uj)on Mcspilus xanthocarpa Loddiges, the fruit of which was ard-;nown to him, Lindloy 

 based his Pyrus melanocarpn /3 itiihpubencens wKich prol)Hl>Iy belongs to tlie following species. 



^ As the (Lite of Lindlcy's publication usujdly the date of the title page, IS^O, is cited, hut 

 the vohinie was published in parts and Lindley's article must liave appeared between IS^O 

 and 1S2S, us lie does not cite it in 1820, while in 1828 he (piotes it uiuler phite 1154 of the Bo- 

 tanical Register. 



