1910.] NATURAL SCIENCES OF PHILADELPHIA. 167 



Nine Mile Run, near Pittsburg, Allegheny County, O. E. Jennings 

 and Grace E. Kinzer, (No. 43 type) October 10, 1905, May 25, 1906, 

 May 28 and October 30, 1907, O. E. Jennings and B. H. Smith, October 

 5, 1907; Panther Hollow, Schenley Park, Pittsburg, Allegheny County, 

 O. E. and Grace K. Jennings, (No. 69) May 17, 1907, O. E. Jennings 

 and B. H. Smith, October 5, 1907, O. E. Jennings, (No. 71) May 19, 

 1909; Nine Mile Run, Pittsburg, O. E. Jennings, (No. 41, with a 

 rather more shallow calyx cavity of the fruit) October 7, 1905, May 25, 

 1906, May 28 and October 5, 1907; Kit-tanning, Armstrong County, 

 O. E. Jennings, (No. 47) October 14, 1905, May 28, 1906, May 26 and 

 October 7, 1907. 



2. Crataegus viatica Ashe. 



Ann. Carnegie Mus., I, pt. 3, 398 (1902). 



Glabrous with the exception of the hairs on the upper surface of 

 the young leaves. Leaves oblong-ovate, acuminate, rounded or 

 cuneate at the base, coarsely often doubly serrate, with straight 

 glandular teeth, and sometimes divided into short broad lateral lobes ; 

 about one-third grown when the flowers open at the end of May and 

 then very thin, light yellow-green and slightly hairy along the mid- 

 ribs above and pale below, and at maturity thin but firm in texture, 

 dark bluish green, smooth and lustrous on the upper surface, paler 

 on the lower surface, 5-5.5 cm. long and 3.5-4 cm. wide, with promi- 

 nent midribs and thin primary veins; petioles slender, occasionally 

 glandular, with deciduous glands, 2.5-3 cm. in length; leaves on 

 vigorous shoots thicker, rounded or truncate at the broad base, more 

 coarsely serrate, more deeply lobed, and often 6-7 cm. long and 

 broad, with stout midribs, prominent primary veins and stout winged 

 glandular petioles. Flowers 2.5-3 cm. in diameter, on long slender 

 pedicels, in compact usually 5-9-flowered corymbs, the lower peduncles 

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

 lobes gradually narrowed from the base, short, slender, acuminate, 

 entire or occasionally dentate near the middle, reflexed after anthesis ; 

 stamens 18-20; anthers light rose-pink; styles 4 or 5, surrounded 

 at the base by a narrow ring of pale tomentum. Fruit ripening in 

 October, on stout spreading or drooping pedicels, in few-fruited clusters 

 short-pyriform, rounded at the apex, truncate at the base, yellowish 

 green, punctate, pruinose, becoming lustrous, 1.1-1.2 cm. long, 9-10 

 mm. in diameter; calyx prominent, with a short tube, a broad deep 

 cavity pointed in the bottom, and spreading and reflexed persistent 

 lobes; flesh yellow-green, acid, dry and mealy; nutlets 4 or 5, usually 



