An illustrated flora of the An illustrated flora of the northern United States, Canada and the British possessions : from Newfoundland to the parallel of the southern boundary of Virginia and from the Atlantic Ocean westward to the 102nd meridian ed2illustratedflo02brit Year: 1913 45. Crataegus populnea Ashe. Gruber's Thorn. Fig- 2379. C. populnea Ashe, Ann. Cam. Mus C. stolonifera Sarg. Bot. Gaz. 35 : 395- 1902. 1903. A shrub or small tree, sometimes 20° high, with a flattened round crown. Spines 1-2' long; leaves mem- branous, slightly villous above, becoming glabrate, broadly ovate to elli
An illustrated flora of the An illustrated flora of the northern United States, Canada and the British possessions : from Newfoundland to the parallel of the southern boundary of Virginia and from the Atlantic Ocean westward to the 102nd meridian ed2illustratedflo02brit Year: 1913 45. Crataegus populnea Ashe. Gruber's Thorn. Fig- 2379. C. populnea Ashe, Ann. Cam. Mus C. stolonifera Sarg. Bot. Gaz. 35 : 395- 1902. 1903. A shrub or small tree, sometimes 20° high, with a flattened round crown. Spines 1-2' long; leaves mem- branous, slightly villous above, becoming glabrate, broadly ovate to elliptic-ovate, i'-2i' long and wide, acute to acuminate at the apex, broadly cuneate to truncate at the base, those of the vegetative shoots usu- ally cordate, serrate or tviice serrate, the lobes broad, acute or none; corymbs glabrous; flowers 8'-io' broad; stamens 5-10; anthers pink; styles and nutlets usually 3 or 4; fruit glabrous to short-ellipsoid, scarlet, 5'-7' thick, calyx-lobes appressed or spreading; flesh yellow. Low grounds, southern Ontario to Pennsylvania and Dela- ware. May ; fruit ripe September. 46. Crataegus aspera Sargent. Rough-leaved Thorn. Fig. 2380. Crataegus ;SX^ruhs 2: 131- 1908. C. bracteata Sarg. Rep. Mo. Bot. Gard. 19; 91. July 1908. A shrub, sometimes 7° high, with slender zigzag branchlets. Spines numerous, curved, \l'-2\' long; leaves ovate, ii'-2i' long, f'-2' wide, acute or acumi- nate at the apex, rounded or truncate at the base, finely serrate or doubly serrate, with 3 or 4 pairs of acute lobes, yellow-green, membranous, appressed-pubescent, becoming scabrate above, tomentose beneath; petioles tomentose, I'-iJ' long; corymbs few-flowered; pedicels slightly pubescent, becoming glabrous; flowers 8' or 9' broad; calyx-lobes triangular; stamens about 10; styles and nutlets usually 4 or 5; fruit short-ellipsoidal to subglobose, scarlet, very pruinose, 5' or 6' thick; calyx-tube little enlarged, the lobes obtuse, spreading, o
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