48 MISSOUIU BOTANICAL GARDEN. 



serrate, often 5-8 cm. long and 3.5-4 cm. wide, with stouter midribs and 

 petioles, more prominent primary veins, and foliaceous lunate serrate 

 stipules. Flowers 1.2-1.3 cm. in diameter, on long slender pedicels, in 

 w^ide lax mostly 15-20-flowered corymbs, the elongated lower peduncles 

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

 , long, slender, acuminate, entire or minutely dentate near the middle, 

 sparingly viliose on the inner surface, rcflexed after anthcsis; stamens 5-10; 

 anthers pale salmon color; styles 1 or 2, or rarely 3. Fruit ri(x;ning early 

 in October, on long slender drooping pedicels, in few-fruited clusters, 

 short-oblong, full and rounded at the ends, dull red blotched with green, 

 1-1.2 cm. in diameter; calyx little enlarged, with a deep narrow cavity, 

 and slightly spreading or incurved often deciduous lobes; flesh thin, green, 

 dry and hard; nutlets 1-3, rounded and obtuse at the ends, ridged on the 

 back, w4th a high broad slightly grooved ridge, 7-7.5 mm. long, and about 

 3 mm. wide, or when 1, 5.5-6 mm. in diameter. 



* 



A tree often 4 or 5 m. high, with a trunk sometimes 1.5-2 

 dm. in diameter, small spreading branches forming a wide 

 flat-topped head, and stout slightly zigzag branclilets dark 

 orange-green faintly tinged with red when they first appear, 

 becoming chill reddish brown in their first season and ashy 

 gray the following year, and armed with numerous slender 

 nearly straight chestnut-brown sliiiiing ultimately dark gray 

 spines 2-4.5 cm. long. 



Roadsides five miles north of Swan, in Christian County, 

 B. F. Bush (No. 16 type), Sept. 28, 1905, April 20 and Mav 

 26, 1907. 



This is the last of the Crus-galli species of this region to 

 flower. 



7. Crataegus fecunda Sargent, Bot. Gazette, xxxiii. Ill 



(1902); Silva N. Am. xiii. 47, t. G41; Manual, 371, f. 289. 



Near AUcnton, St. Louis County, and Mississippi River bot- 

 toms, East St. Louis, Illinois. 



8. Crataegus tenuis, n. sp. 



Leaves oblong-obovatc to oval, acute or acuminate and short-pointed or 

 rounded at the apex, gradually narrowed and cuneate at the entire base, 

 and finely cretiately serrate above; about half-grown when the flowers 

 open at the end of April or early in May and then thin, light yellow-green 

 and hairy along the midribs above and pale and occasionally viliose on the 

 midribs below, and at maturity subcoriaceous, glabrous, dark green and 

 lustrous on the upper surface, dull green on the lower surface, 2.5-3.5 cm. 



lone and 1.5-1.8 cm. wide, with thin midribs, and obscure nrimarv veins 



