532 MALACEAE 



long : hypanthium usually densely white-woolly : petals spatulate or linear-spatulate, 6-14 

 mm. long, 2-3 times as long as the sepals : -pome globose, 6-8 mm. in diameter. 

 In swamps and moist soil, New Brunswick to Manitoba, Florida and Louisiana. Spring. 



3. Amelancbier spickta (Lam. ) Dec. A shrub usually 3-6 dm. tall, the foliage and 

 inflorescence glabrous at maturity. Leaf-blades oval or broadly elliptic, 2-4 cm. long, 

 serrulate or dentate-serrate, sometimes toothed only above the middle, rounded at both 

 ends, or sometimes abruptly pointed at the apex, or subcordate at the base : racemes 4-10- 

 flowered : pedicels 1-2.5 cm. long : sepals nearly triangular : petals 4-8 mm. long : pomes 

 about 6 mm. in diameter. 



In rocky places, New York to Nortii Carolina. Spring. 



4. Amelancbier rotundlfolia (Michx. ) Eoem. A tall shrub, or a small tree, gla- 

 brous throughout, at least at maturity. Leaf-blades broadly oval, ovate or suborbicular, 

 4-8 cm. long, obtuse or rounded at both ends, or sometimes abruptly pointed at the apex or 

 often cordate, serrate, the teeth often incurved : racemes several-flowered : pedicels 2-4 

 cm. long : sepals lanceolate : petals 10-16 mm. long : pomes 6-8 mm. in diameter. 



In woods and thickets, New Brunswick to Minnesota and North Carolina. 



6. CRATAEGUS L.' 



Small trees or shrubs, usually armed with thorns or spines. Leaves alternate : blades 

 simple, petioled. Flowers terminal, cymose or corymbose. Hypanthium cup-shaped or 

 campanulate, adnate to the carpels. Sepals 5, reflexed after anthesis. Corolla white or 

 pink. Petals 5, spreading, rounded, inserted on the margin of the disk in the throat of the 

 hypanthium. Stamens 5-25, inserted in 1-3 rows on the edge of the hypanthium : fila- 

 ments slender, incurved : anthers oblong or suborbicular, white, yellow, pink or purple. 

 Ovary inferior, or its summit free, composed of 1-5 carpels : styles 1-5, not united, per- 

 sistent : stigmas terminal. Pome globose, pyriform or oval, yellow, orange-red, blue or 

 black, containing 1-5 bony carpels, each usually 1 -seeded. Seed erect, the testa mem- 

 branous. Haw. The plants bloom in the spring. 



Lateral or ventral faces of the nutlets grooved or hollowed. I. TOMENTOSAE. 



Lateral or ventral faces of the fertile nutlets plane or plano-convex. 

 Hypostyle short and broad, upwardly and dorsally extended over 

 the apex of the nutlets. 

 Fruit small, bright scarlet at maturitv. II. CORDATAE. 



Fruit about 1 cm. in diameter, blue at maturity. TIL BREVISPINAE. 



Hypostyle confined to the ventral or lateral surfaces of the nutlets, 

 abruptly terminated at the apex. 



a. Corymbs simple, 2-5-flowered, glabrous, expanding in Febru- 



ary and early March : fruit globose, red or orange-red, ripen- 

 ing from May to July. IV. AESTIVALES. 



b. Corymbs compound, many-flowered, usually glabrous (pilose 



in nos. 13 and 16), stamens normally 20 : fruit red or yellow, 



less than 1 cm. in diameter. * V. VIRIDES. 



0. Corvmbs simple, 3-7-tlowered, glabrous or sparsely ])ubescent : 



stamens 10: fruit globose, red. VI. SILVICOLAE. 



d. Corymbs few-manv-flowered, glabrous or pubescent : stamens 



20 : fruit globose" or oval, red or yellow. VII. PUNCTATAE. 



e. Corymbs 4-10-flowered, glabrous : stamens 10 : fruit glabrous, 



at maturity red, red and yellow or clear yellow, the flesh 

 firm: leaf-blades broadly ovate, oval or obovate, those of 

 the shoots frequently deltoid-ovate, eventually glabrous. VIII. BOYNTONIANAE. 



f. Corymbs 4-10-flo\vered, glabrous or very nearly so : stamens 



20 : fruit glabrous, 15 mm. in diameter or less, at maturity 

 yellow, orange, green or red, the flesh firm : leaf-blades gla- 

 brous when grown, ovate, lanceolate, elliptic or sometimes 

 obovate, serrate and shallowly incised (deeply incised in 

 no. 40). IX. SARGENTIANAE. 



g. Corymbs similar to those of the next preceding section : fruit 



small, oval, subpyriform or globose : leaf-blades deeply and 

 acutelv incised or with numerous serrate rounded lobe-like 



incisions. X. PULCHERRIMAE. 



h. Corymbs 1-, 2- or 3- flowered, or frequently 5-7-flowered, the 

 pedicels and hypanthium either glabrous, pubescent or to- 

 mentose: fruit glabrous, yellow, green, orange or red, the 

 flesh usually soft, and pleasant to the taste : leaf-blades 

 various in outline, serrate, crenate, dentate or entire, pubes- 

 cent or glabrous : branches often pendulous. 



'Contributed by Mr. C. D. Beadle. — The treatment of the genus here presented is 

 based only on the material at the Biltniore Herbarium, supplemented by brief notes taken 

 at several of the leading herbaria. C. D. B. 



