CRATAEGUS IN MISSOURI. 



53 



cavity, and small spreading and incurved lobes, their tips often deciduous 

 from the ripe fruit; flesh thin, yellow, dry and mealy; nutlets 1 or 2, full 

 and rounded at the ends, ridged on the back, with a broad grooved ridge, 

 6-7 mm. long, and 4-4.5 mm. wide, or when 1, 5-5.5 mm in diameter, 



A shrub 5-8 m. high, with several large slightly spreading 

 stems, covered with dark scaly bark, spreading branches form- 

 ing a broad round-topped head, and stout zigzag branchlets 

 light orange-brown when they first appear, becoming rather 

 darker orange-brown, slightly lustrous and marked by large 

 pale lenticels in their first season, and dull gray-brown the 

 following year, and armed with very numerous slender slight- 

 ly curved purple spines 4-8 cm. long, usually pointed toward 

 the base of the branch, and persistent and compound on old 

 stems and branches. 



Hillsides, Prosperity Junction, near Webb City, Jasper 

 County, B. F. Bush (No. 3 A or 534 type), May 19, 1901, 

 E. J. Palmer, Oct. 27, 1901, B. F. Bush (No. 3 or 533), May 

 19, 1901, E. J. Palmer and C. S. Sargent, Oct. 2, 1901, B. F. 

 Bush (No. 3 D or 537), May 19, 1901, E. J. Palmer (No. 3 G), 

 Oct. 27, 1901, B. F. Bush (No. 3 H or 541), May 19, 1901, 

 E. J, Palmer, Oct. 27, 1901, B. F. Bush (No. 3 I or 542), 

 May 19, 1901, E. J. Palmer, (No. 27) August 8, 1906, May 9 

 and 14 and October 4, 1907, (No, 27 C) October 13 and No- 

 vember 13, 1907; Neck City, Jasper County, E. J. Palmer, 

 (Nos. 10, 10 A, 10 B) April 28, 1907, (No. 13) April 28 and 

 October 4, 1907. 



13. Crataegus albanthera, n. sp. 



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Glabrous with the exception of a few hairs on the upper side of the mid- 

 ribs of the young leaves. Leaves oblong-obovate, rounded or rarely acute 

 at the apeXy gradually narrowed from near the middle to the concave- 

 cuneate entire base^ and finely doubly serrate above, with straight glandular 

 teeth; nearly fully grown when the flowers open from the first to the middle 

 of May and then light yellow-green, lustrous and slightly hairy along the 

 midribs above and pale below, and at maturity subcoriaccous, dark yellow- 

 green and lustrous on the upper surface, pale bluish green on the lower 

 surface, 3,5-4.5 cm. long and 1.5-2.5 cm. wide, with thin midribs, and very 

 slender generally prominent primary veins; petioles stout, wing-margined 

 nearly to the base, often tinged with rose color in the autumn, 7-8 mm. 

 in length. Flowers about 1,5 cm. in diameter, on short slender pedicels, 

 in small compact mostly 7-12-flowered corymbs, the lower peduncles from 

 the axils of upper leaves; calyx- tube narrowly obconic, the lobes short and 



