1905.] NATURAL SCIENCES OF PHILADELPHIA. 605 



western New York, but differs from that species in its few-flowered 

 corymbs, more slender and elongated mostly entire calyx-lobes, and 

 in its more obovate greenish-yellow fruit without bloom, the fruit of 

 Cratcegus compta being bright cherry-red and coated with a thick 

 glaucous bloom. It is named for its discoverer. Dr. Clayton Detweiler 

 Fretz, the enthusiastic and industrious student of the flora of Bucks 

 county. 

 22. Crataegus scabriusoula n. sp. 



Leaves ovate to rhombic, acute or acuminate at the apex, full and 

 rounded or concave-cuneate at the entire base, sharply doubly serrate 

 above, with straight glandular teeth, and divided into 3 or 4 pairs of 

 short broad acute lateral lobes, slightly tinged with red when they 

 unfold, nearly half-grown when the flowers open about the 10th of May 

 and then yellow-green and roughened above by short rigid white hairs 

 and paler and glabrous below, and at maturity thin but firm in texture, 

 light blue-green and scabrate on the upper and pale or glaucous on the 

 lower surface, 4-5 cm. long and 3.5-4 cm. wide, with thin yellow mid- 

 ribs and slender primary veins arching obliquely to the points of the 

 lobes; petioles slender, grooved, slightly wing-margined at the apex, 

 conspicuously glandular at first, the glands mostly deciduous, and 

 2-3 cm. in length ; stipules linear, acuminate, glandular, fading pink 

 caducous ; leaves on vigorous shoots deltoid to broadly ovate, truncate 

 or rounded at the base, more coarsely serrate and more deeply lobed, 

 5-6 cm. long and broad, with stout glandular petioles 1.2-1.6 cm. in 

 length. Floivers about 1.5 cm. in diameter, on slender elongated pedi- 

 cels, in compact 5-8-flowered corymbs, with linear glandular caducous 

 bracts and bractlets; calyx-tube narrowly obconic, the lobes gradually 

 narrowed from broad bases, acuminate, entire or slightly and irregu- 

 larly serrate above the middle, their tips often bright red, reflexed after 

 anthesis; stamens 6-8; anthers red; styles 3 or 4, surrounded at the 

 base by a broad ring of hoary tomentum. Fruit ripening about the 

 1st of October on slender pedicels, in few-fruited drooping clusters, 

 obovate, full and rounded at the apex, gradually narrowed from above 

 the middle to the slender base, dull red, not pruinose, about 1 cm, long 

 and 8 cm. wide; calyx enlarged and prominent, without a tube, and 

 with a broad shallow cavity and spreading closly appressed mostly per- 

 sistent sparingly serrate lobes red on the upper side below the middle; 

 flesh thin, dry or mealy; nutlets 3 or 4. 



An arborescent shrub 3-4 m. high, with slender nearly straight 

 branchlets marked by numerous oblong pale lenticels, light yellow- 

 green'slightly tinged with red when they first appear, bright red-brown 



