﻿1903] CRATAEGUS IN NORTHEASTERN ILLINOIS 399 



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usually slightly wider than high, scarlet, lustrous, marked by 



few small dots S-iO"'"' in diameter; calyx prominent, nearly ses- 



\ sile, with a narrow deep cavity and enlarged coarsely serrate 



reflexed and closely appressed lobes villose on the upper side, and 

 usually persistent on the ripe fruit; flesh thin, yellow, dry and 

 mealy, not becoming succulent ; nutlets 2 or 3, full and rounded 

 at the ends, 6^"^ Jc»ng, j"""' wide, rounded and prominently 

 grooved on the back, with a wide doubly grooved ridge, the 

 ventral cavities broad and deep. 



A shrub 1-2'" in height with stout branchlets, dark reddish-brown and 

 marked by large pale lenticels when they first appear, light red-brown and 

 very lustrous at the end of their first season, rather darker-colored and still 

 lustrous the following year, and armed with numerous very stout nearly 

 straight dark purple shining spines 6-9'™ long. 



Sandy shores of Lake Zurich, Hill and Sargent, September 22, iqoo, 

 E.J, Hill, May and October 1901. 



Crataegus rutila, n. sp, — Leaves broadly ovate to oval or 

 suborbicular, rounded or abruptly narrowed and acute at the 

 apex, rounded, concave-cuneate or rarely slightly cordate at the 

 wide entire base, sharply and doubly serrate above, with straight 

 glandular teeth, and divided above the middle into numerous 

 small acuminate lobes; more than half-grown when the flowers 

 open and then membranaceous, dark yellow-green, very smooth 

 and glabrous above with the exception of numerous short white 

 deciduous hairs on the upper side of the midribs, and pale and 

 slightly pubescent or nearly glabrous below ; at maturity subcori- 

 aceous, dark yellow-green on the upper surface, light yellow and 

 glabrous or puberulous on the lower surface, 4.5^70^°' '^^"^g* 

 4.5-6.5^"^ wide, with very stout yellow midribs deeply impressed 

 above, 5 or 6 pairs of prominent primary veins, and thick con- 

 spicuous reticulate veinlets ; petioles stout, wing-margined often 

 to the middle by the decurrent base of the leaf-blades, covered 

 on the upper side early in the season with short soft hairs, 

 becoming glabrous, often tinged with purple in the autumn, 

 1-2.5^"^ in length; stipules linear, acuminate, glandular, with 

 small stipitate red glands, caducous. Flowers about 1.5'^ m 

 diameter on long slender sparingly villose pedicels, in broad 

 compact many-flowered thin-branched nearly glabrous compound 



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