This section is from the book "An Illustrated Flora Of The Northern United States, Canada And The British Possessions Vol2", by Nathaniel Lord Britton, Addison Brown. Also available from Amazon: An Illustrated Flora of the Northern United States, Canada and the British Possessions. 3 Volume Set..
1897. Crataegus missouriensis Ashe, Bull. N. Car.
Agric. Coll. 175: no. 1900.
A shrub, sometimes 10° high, with ascending branches and a round symmetrical crown. Spines numerous, slender, 1'-2' long; leaves elliptic-ovate to obovate, 3/4'-2 1/4' long, 1/2-1 3/4' wide, acute at the apex, cuneate, coarsely serrate or doubly so, subcoriaceous, rough-pubescent and shining above, pale-tomentose beneath; petioles 2"-4" long; corymbs pubescent; flowers 6" or 7" broad; stamens about 20; anthers pink; styles and nutlets 3-5; calyx-lobes laciniate; fruit subglobose to pyriform, orange-red, about 5" thick, slightly villous, calyx-tube rather prominent, the lobes persistent, reflexed.
C. Brainerdi Sarg. Rhodora 3: 27. Feb. 1901.
C. scabrida Sarg. Rhodora 3: 29. 1901.
C. Egglcstoni Sarg. Rhodora 3: 30. 1901.
C. asperifolia Sarg. Rhodora 3: 31. 1901.
C. Schuettei Ashe, Journ. E. Mitch. Soc. 2: 7. July 1901.
A shrub or tree, sometimes 200 high, with ascending branches. Spines 1'-2 1/2' long; leaves elliptic to ovate (in the Egglestoni type often oval to orbicular), acute or acuminate at the apex, abruptly cuneate or rounded at the base; finely serrate or doubly serrate and lobed, 1 1/4'-3 1/2' long, 3/4'-2 1/2' wide, subcoriaceous or membranous; bright green and glabrate or occasionally scabrate above, pubescent along the veins beneath; corymbs glabrous; flowers about 10" broad; stamens 5-20; anthers pink; styles and nutlets 2-4; fruit short-ellipsoid to globose, cherry-red to scarlet, about 5" thick; nutlets usually with shallow pits on the ventral faces.
New England to northeastern Iowa, south to Pennsylvania. May; fruit ripe September.
C. laurentiana Sarg. Rhodora 3: 77. April 1901. C. Fernaldi Sarg. Rhodora 5: 166. June 1903.
A large much branched shrub, sometimes 15° high, with spines 2' or 3' long. Leaves oblong to oblong-ovate, 1 1/4'-3' long, 1-2' wide, acute or acuminate at the apex, cuneate at base, sharply serrate or doubly serrate with 3-5 pairs of acute lobes towards the apex, subcoriaceous, bright yellow-green above, pubescent beneath, becoming glabrous; corymbs white-tomentose; flowers 7" or 8" broad; stamens about ten, anthers small, pale pink; calyx-lobes glandular-margined, lanceolate; styles and nutlets 4 or 5; fruit ellipsoid, dark crimson, 5" or 6" thick, slightly villose; calyx-lobes reflexed, persistent.
Newfoundland, Nova Scotia, Quebec, Maine, and shores of Lake Superior. June; fruit ripe September.