310 



MALACEAE. 



VOL. II. 



Crataegus flava Aiton. Summer or Yellow Haw. Fig. 2373. 



Crataegus flava Ait. Hort. Kew. 2: 169. 1789. 

 Mespilus caroliniana Poir. in Lam. Encycl. 4: 442. 1797. 

 Crataegus flexispina Lauche, Deutsch. Dend. 569. 1883. 

 Not Mespilus flexispina Moench. 



A slender tree, with rough bark and ascending 

 branches, sometimes 20 high, the thorns slender, '-2' 

 long. Leaves obovate or ovate, acute or obtuse at the 

 apex, cuneate at the base, i'-2i' long, '-2' broad, den- 

 tate-serrate or doubly so, slightly pubescent above when 

 young, glabrous when mature; petioles 3"-i2" long, 

 slightly winged above; corymbs few-flowered; pedicels 

 and calyx slightly pubescent ; flowers about 9" broad ; 

 calyx-lobes entire, glandular-margined; stamens about 

 10; anthers pink; styles usually 3 or 4; fruit ellipsoid- 

 pyriform, yellowish-green, sometimes checked with red, 

 about 8" thick; flesh hard at maturity. 



Summits of sandy ridges, southeastern Virginia to Florida. 

 Red haw. April ; fruit ripe October. 



40. Crataegus flabellata (Bosc) K. Koch. Bosc's Thorn. Fig. 2374. 



Mespilus flabellata Bosc ; Desf. Tab. de L'Ecole 2 : 271. 1815. 

 M. flabellata Bosc; Spach, Hist. Veg. 2: 63. 1834. 

 C. flabellata K. Koch, Weissd. 240. 1853. 

 C. crudelis Sarg. Rhodora 5 : 143. 1903. 

 C. blandita Sarg. Rhodora 5: 147. 1903. 



A large shrub or small tree, with ascending branches, 

 sometimes 20 high. Spines numerous, i'-4'long; leaves 

 ovate to broadly ovate, \\'-2\' long, \'-2\' wide, acute 

 at the apex, broadly cuneate or truncate at the base, 

 serrate or doubly serrate, sharply lobed, with the tips of 

 the teeth often recurved, slightly villous above, becoming 

 scabrate or glabrate ; corymbs many-flowered, slightly 

 villous; flowers 7"-io" broad; stamens about 10; styles 

 and nutlets 3-5; fruit ellipsoid, 4"-6" thick, scarlet or 

 crimson ; flesh succulent. 



Along the St. Lawrence River, Quebec. 

 September. 



May ; fruit ripe 



41. Crataegus roanensis Ashe. Roan Moun- 

 tain Thorn. Fig. 2375. 



C. roanensis Ashe, Bull. N. Car. Agric. Coll. 175: 114. 



1900. 



C. fliifiatilis Sarg. Rhodora 5: 117. April 1903. 

 C. ascendens Sarg. Rhodora 5: 141. May 1903. 



A shrub or small tree, sometimes 20 high, with 

 ascending branches and numerous curved spines !'- 

 2j' long. Leaves ovate or oblong-ovate, acute at the 

 apex, broadly cuneate to cordate at the base, serrate 

 with 3-6 pairs of acute straight lobes, i'-2f long, 

 f'-2i' wide, membranous, slightly villous, becoming 

 glabrate, dark yellow-green above; corymbs glabrous 

 or slightly villous; flowers about 8" broad; stamens 

 5-20, usually 5-10; styles and nutlets usually 3 or 4; 

 fruit ellipsoid, ovoid or pyriform, crimson, 3" or 4" 

 thick; flesh rather firm. 



Quebec to Wisconsin, North Carolina and Tennessee. 

 May ; fruit ripe September. 



