96 MISSOURI BOTANICAL GARDEN. 



15, 1905, September 28, 1907, (No. 9 B) May 7, 1903, October 

 15, 1905. 



9. Crataegus aperta, n. sp. 



Glabrous, Leaves broadly ovate, acuminate, rounded, truncate or 

 rarely abruptly cuneute at the wide base, finely doubly serrate, with straight 

 glandular teeth, and divided into 3 or 4 pairs of small acuminate lobes; 

 deep bronze color when they unfold, more than half-grown when the flow- 

 ers open about the 20th of April, and then thin, light yellow-green above 

 and pale bluish green below, and at maturity thin, blue-green, smooth and 

 lustrous on the upper surface, lighter bluish green on the lower surface, 

 4-7 cm. long and 4.5-5 cm. wide, with stout midribs, and slender primary 

 veins. Flowers 1.8-2 cm. in diameter, on long slender pedicels, in small 

 compact mostly 5-7-flowercd corymbs, with conspicuous obovate to linear 

 glandular bracts and bractlets fading rose color and often persistent until 

 after the flowers open, the lower peduncles from the axils of upper leaves; 

 calyx-tube broadly obconic, the lobes gradually narrowed from w^ide bases, 

 short, minutely glandular-dentate near the middle, reflexed after anthesis; 

 stamens 20; anthers light yellow; styles 3-5. Fruit ripening in October, 

 on stout spreading pedicels, in few-fruited clusters, subglobose, dull green 

 slightly tinged with red, about 1 cm. in diameter; calyx prominent, with- 

 out a tube, with a broad deep cavity tomentose in the bottom, and small 

 spreading lobes; flesh green, hard and dry; nutlets 3-5, rounded at the 

 base, narrowed and rounded or acute at the apex, irregularly ridged on the 

 back, with a high narrow ridge G-6.5 mm. long, and 4-4.5 mm. wide, 



A narrow shrub sometimes 5 m. high, with small stems, 

 erect branches, and slender nearly straight branchlets dark 

 green tinged with red when they first appear, becoming darl 

 chestnut-brown in their first season and dull grayish brown 

 the following year, and armed with slender straight or slightly 

 curved purple ultimately ashy gray spines 3-5 cm, long. 



Rocky Hills, Swan, Taney County, B. F. Bush, (No. 19 A 

 type) April 22 and October 7, 1907, (Nos. 19, 19 B, 19 C) 

 April 22 and 23, 1907, 



10. Crataegus callicarpa, n. sp. 



Glabrous with the exception of the hairs on the young leaves and calyx- 

 lobes. Leaves ovate, acute, cordate at the base, very coarsely often doubly 

 serrate, with long straight ^^landular teeth, and shghtly di\dded into 3 or 4 

 pairs of short broad acuminate lateral lobes; not more than a quarter 

 grown when the flowers ojx^n late in April and then very thin, yeflow-grecn 

 and slightly hairy above and on the midribs below, and at maturity thin, 

 glabrous, crumpled, dark yellow-green and very lustrous on the upper 

 siirfMco. nnlf^ vf^llow-PToon on the low^er surface. 5.5-6.5 cm. Ions: and 



i 



