CRATAEGUS IN MISSOURI. 125 



flesh thin, yellow, sweet and succulent; nutlets 2, rounded at the ends, 

 ridged on the back, with a low ridge, penetrated on the inner faces by narrow 

 deep cavities, 5.5-G mm. long, and 2-2.5 mm. wide. 



I 



A tree 7-8 m. high, with a trunk sometimes 2 dm. in diam- 

 eter, small ascending and spreading branches, and stout 

 slightly zigzag glabrous branchlets light green when they 

 first appear, becoming bright chestnut-red, very lustrous and 

 marked by dark lenticels in their first season and dark reddish 

 brown the following year, and armed with very numerous 

 stout slightly curved bright chestnut-brown ultimately ashy 

 gray spines 4.5-8 cm. long. 



Roadside five miles north of Swan, in Christian County, B. F. 

 Bush, (No. 23 B type) May 16 and October 6, 1907, (Nos. 23 



and 23 A) May 16, 1907, (No. 23 C) May 16 and October 6, 

 1907. 



13. Crataegus pertomentosa Ashe, Jour. Elisha Mitchell 



Sci, Soc. xvi. pt. ii. 70 (1900). — Mackenzie & Bush, 

 Manual Fl. Jackson County, Missouri, 108. 



Leaves ovate to rhombic, acuminate, gradually narrowed and concave- 

 cuneate at the entire base, sharply often doubly serrate above, with straight 

 glandular teeth, and occasionally slightly divided above the middle into 

 small acute lobes; about half-grown when the flowers open the middle of 

 May and then thin, bluish green, villose on the upper side of the midribs and 

 roughened above by short white hairs, and pale and villose below especially 

 on the midribs and veins, and at maturity subcoriaceous, lustrous and sca- 

 brate on the upper surface, still villose on the lower surface, 5-5.5 cm. long 

 and 3-4 cm. wide, with stout midribs often rose-colored in the autumn, and 

 slender primary veins deeply impressed on the upper side of the leaves; 

 petioles stout, wing-mar^ned at the apex, sparingly villose early in the 

 season, becoming glabrous, 8-10 mm. in length; leaves on vigorous shoots 

 thicker, broadly ovate to oval, acute at the apex, rounded or concave- 

 cuneate at the base, more coarsely serrate, often more deeply lobed, 

 frequently 6-7 cm. long and 5.5-6.5 cm, wide. Flowers 1.5-1.6 cm. in 

 diameter, on long slender densely villose pedicels, in wide mostly 18t20- 

 flowered hairy corymbs, with linear-lanceolate to hnear acuminate finely 

 glandular-serrate bracts and bractlets fading brown and generally per- 

 sistent until the flowers open, the much elongated lower peduncles from 

 the axils of upper leaves; calyx-tube narrowly obconic, densely villose, 

 the lobes long, slender, acuminate, laciniately glandular-serrate below 

 the middle, glabrous on the outer, villose on the inner surface, reflexed 

 after an thesis; stamens 10; anthers pale yellow; styles 2, surrounded at 

 the base by a broad ring of pale hairs. Fruit ripening late in September 



