CRATAEGUS IN MISSOURI. 



61 



and mealy; nutlets 3-5, thin, narrowed and rounded, or when 5 acute 

 at the ends, slightly ridged on the back, with a thin grooved ridge, 5-5.5 

 mm. long, and about 3 mm. wide. 



A tree 4-5 m. high on dry hills or 7 or 8 m. high on moist 

 bottoms, with a trunk 1.5-3 dm. in diameter, covered with 

 dark scaly bark, small horizontal branches forming a round- 

 topped head, and stout slightly zigzag branchlets light or- 

 ange-green when they first appear, becoming light chestnut- 

 brown, lustrous and marked by small pale Icnticels in their 

 first year and dark red-brown in their second season, and 

 armed with numerous slender nearly straight light chestnut- 

 brown shining spines 2.5-5 cm. long. 



Dry rocky hillsides, and in rich soil near small streams. Pros- 

 perity Junction, near Webb City, Jasper County, E. J. Palmer 

 and C. S. Sargent (No. 1 type), Oct. 2, 1901, E. J. Palmer, 



Oct. 27, 1901, May 6, 1902. 



This species is unusual in the Crus-galli group in its few- 

 flowered corymbs, and in the number of styles, which are 

 often 5. The small thin nutlets are also unusual in this 



group 



renijisj n; tU 



upper surface of the 



young Icaves'ancf oii'the calj^-lobe^ti. .Leases broadly ovate to obovate, 

 li.^,,r>rqn^ r^r nniifo nn<l «h*orl-nniti tefl aif tLfe'aoex. gradually narrowed to 



rounded 

 the concav 



1-poiIitefl 3^ tjife 

 fease/aftJ*nnefv < 



gJqJiAul 



the flowers open the middle of 5faJ*'and then thin, yellow-green, smooth, 

 lustrous, and slightly hairy on the midribs above and pale below, and at 

 maturity subcoriaccous, glabrous, yellow-green and lustrous on the upper 

 surface, pale bluish green on the lower surface, 4-5 cm. long and 2-3 cm. 

 wide, with thin midribs, and slender primary veins mostly within the 

 parenchyma; petioles slender, narrow-wing-mar^ned nearly to the base, 

 often ros9 color in the autumn, 6-7 mm. in length; leaves on vigorous 

 shoots thi(;ker, oval to ovate, short-pointed, coarsely serrate nearly to the 

 base, often 5 cm. long and 4 cm. wide, with stout broadly winged petioles. 

 Flowers 1.6-1.8 cm. in diameter, on long slender pedicels, in wide many- 

 flowered corymbs, the lower peduncles from the a:dls of upper leaves; 

 calyx-tube narrowly obconic, the lobes gradually narrowed from the base, 

 slender, acuminate, entire or minutely glandular-dentate, glabrous on the 

 outer, sparingly villose on the inner surface, reflexed after anthesis; sta- 

 mens 20; anthers pale yellow; styles 4, surrounded at the base by a 

 narrow rinff of pale tomentum. Fruit ripening late in October, on slender 



