174 DESCRIPTIOXS OP^ THE SHRUBS 



acantha has two grooved stones in smooth-stemmed fruit. Not only is 

 Crataegus monogyna much the commoner in cultivation in America but 

 it has many more named varieties. A good idea of the variation in this 

 species can be gained from the names given them : lacini^ta, cut-leaved ; 

 quercifolia, oak-leaved ; h6rrida, very thorny ; pdndula, creeping ; strfcta, 

 very upright ; variegata, variegated-leaved ; alba pl^na, white-double- 

 flowered ; rubra pl^na, red-double-flowered ; bi'color, two-colored (white 

 flowers with pink edges) ; Pauli, Paul's double scarlet. Of the true Cra- 

 taegus Oxyacantha there is a very distinct and showy variety, xantho- 

 carpa, with bright yellow fruit. 



[Seeds (1-2 years to grow) ; twig cuttings.] 



KEY TO A FEW OF THE MORE ORNAMENTAL SPE- 

 CIES OF CRAT^GUS, INCLUDING PYRACANTHA 



* Leaves decidedly lobed. (A.) 



A. Fruit ^ inch or more wide and retaining the calyx. (B.) 



B. Fruit oval with one stone ; stems of flowers and fruit u.sually 

 distinctly hairy. Hawthorn (262) — Crataegus mon6gyna. 



B. Fruit nearly globular with two stones, each with two grooves 

 on the inner side. English Hawthorn or May (261) — Cra- 

 taegus Oxyacantha. 



A. Fruit small, only about I inch wide, and with deciduous 

 calyx. (C.) 



C. Leaves deeply cleft, sometimes divided nearly to the midrib, 

 |-1^ inches long; fruit dropping in the early winter ; spines 

 stout, 1-1 1 inches long. Parsley-leaved Haw (263) — Cra- 

 taegus Marshallii (C. apiifolia). 



C. Leaves less deeply cleft and larger, l|-2 inches long; fruit 

 remaining on through the winter ; spines slender, n-2 inches 

 long. Washington Thorn — ; Crataegus Phaenopyrum (C. 

 cord^ta). 



* Leaves doubly serrate rather than lobed, broad at base. (D.) 



D. Leaves thick ; flowers large, |-1 inch wide, with yellow an- 

 thers ; fruit with 3-5 stones. (E.) 

 E. Leaves widest at or beyond the middle ; stamens 10 ; fruit 

 nearly globular, ^ inch, dark crimson, ripening late in Oct. 

 and soon dropping. Scarlet ILvw — Crataegus cocci'nea. 

 E. Leaves widest near the base ; stamens 20 ; fruit ripening in 

 Aug., large, |-1 inch, pubescent, scai'let with darker dots, on 

 drooping stems, flesh yellow, dry and mealy. Red Haw 

 (264) — Crataegus m611is. 



