34 



MALACEAE. 



VOL. II. 



21. Crataegus laurentiana Sargent. Fernald's Thorn. Fig. 2355. 



C. laurentiana Sarg. Rhodora 3: 77- April 1901. 

 C. Fernaldi Sarg. Rhodora 5 : 166. June 1903. 



A large much branched shrub, sometimes 15 high, 

 with spines 2' or 3' long. Leaves oblong to oblong- 

 ovate, li'-o' long, I '-2' wide, acute or acuminate at 

 the apex, cuneate at base, sharply serrate or doubly 

 serrate with 3-5 pairs of acute lobes towards the 

 apex, subcoriaceous, bright yellow-green above, 

 pubescent beneath, becoming glabrous; corymbs 

 white-tomentose ; flowers 7" or 8" broad; stamens 

 about ten, anthers small, pale pink; calyx-lobes 

 glandular-margined, lanceolate; styles and nutlets 4 

 or 5; fruit ellipsoid, dark crimson, 5" or 6" thick, 

 slightly villose; calyx-lobes reflexed, persistent. 



Newfoundland, Nova Scotia, Quebec, Maine, and 

 shores of Lake Superior. June ; fruit ripe September. 



22. Crataegus lucorum Sargent. Grove Thorn. 

 Fig- 2356. 



C. lucorum Sarg. Bot. Gaz. 31 : 227. 1901. 



A shrub or tree, with ascending branches, the spines 

 I'-ii' long. Leaves oblong-ovate to broadly ovate, ii'- 

 2i' long, F-2' wide, acute or acuminate at the apex, 

 broadly cuneate or rounded at base, serrate or doubly 

 serrate or lobed towards the apex, membranous, dark 

 dull green above, glabrous and pale beneath; corymbs 

 slightly villous; flowers about 10" broad; stamens about 

 20; anthers small, purple; styles and nutlets 4 or 5; 

 calyx-lobes nearly glabrous on the inner surface, slightly 

 glandular-serrate; fruit pyriform-ellipsoid, crimson, 5" 

 or 6" thick, glabrous; calyx-lobes reflexed; flesh soft, 

 succulent. 



Northen Illinois and Wisconsin. May ; fruit ripe Sep- 

 tember. 



23. Crataegus irrasa Sargent. Blanchard's Thorn. Fig. 2357. 



C. irrasa Sarg. Rhodora 5: 116. April 1903. 



Crataegus irrasa var. divergens Peck, Bull. N. Y. State 



Mus. 75 : 51. 1904. 

 C. Blanchardi Sarg. Rhodora 7: 218. 1905. 



A shrub, sometimes 12 high, with numerous spines 

 i'-3$' long. Leaves ovate to elliptic, acute at the apex, 

 broadly cuneate or truncate at the base, serrate, with 

 4-6 pairs of acute lobes, ii'-24' long, i}'-2i' wide, 

 membranous, slightly pubescent above, becoming gla- 

 brous but remaining pubescent along the veins beneath ; 

 corymbs villous ; flowers about 8" broad ; stamens 

 about 20; anthers yellow or pink; styles and nutlets 

 3-5 ; fruit subglobose to short-ellipsoid, about 5" thick, 

 slightly angled, red or scarlet, somewhat pubescent; 

 calyx-lobes persistent; flesh soft, reddish. 



Montmorency Falls, Quebec, south to southern Vermont 

 and eastern New York. May ; fruit ripe September. 



