108 ELEMENTS OF BOTANY. 



sometimes few or wanting ; leaves thick, oval or obovate, shining 

 above, paler below, obtuse or acute, and sharply serrate at the apex, 

 cuneate and entire at the base ; corymbs terminal, many-flowered, 

 smooth ; flow^ers about | in. wide ; styles 1-3 ; fruit red, subglobose, 

 i in. in diameter. April-May. Common in open woods. 



2. C. SPATHULATA Michx. Small-fruited Haw. A small 

 tree, young twigs tomentose; spines 1-2 in. long; leaves small, 

 spatulate, crenate at the rounded apex, entire and cuneiform below, 

 coriaceous, glabrous, stipules lunate ; corymbs compound, many- 

 flowered ; flowers small ; calyx lobes very short ; styles 5 ; fruit red, 

 about the size of a small pea. March-April. On river banks. 



3. C. APiiFOLiA (Marsh) Michx. Cut-leaved Haw. A small 

 tree with stout spines ; the young branches, leaves, and corymbs 

 w^hitened wdth short hairs ; leaves long-petioled, broadly deltoid, 

 deej^ly incised and toothed ; corymbs compound, many-flowered ; 

 flowers about ^ in. broad ; calyx lobes linear, glandular-pubescent ; 

 styles 1-3, filiform ; fruit bright red, glabrous, small. March-April. 

 River swamps. 



4. C. FLAVA Ait. Yellow" Haw\ A small tree with very 

 numerous spines ; leaves obovate, glandular-serrate at the rounded 

 apex, cuneate below, pubescent when young; petiole short; corymbs 

 few-flowered, slightly pubescent ; flowers ^-| in. wide ; calyx lobes 

 entire or glandular-serrate ; styles 4-5 ; fruit pear-shaped, ^ in. or 

 more in length, greenish-yellow. April-May. On sandy soils. 



58. drupace;e. plum family. 



Trees or shrubs; leaves alternate, simple, often glandular; 

 stipules soon deciduous ; flowers clustered or solitary, perfect, 

 regular ; calyx tube obconic, limb 5-parted ; petals 5 ; sta- 

 mens numerous, both petals and stamens inserted on the 

 summit of the calyx tube ; pistil 1, style 1, stigma usually 

 capitate, ovary 1-celled, 2-ovuled, but usually only one ovule 

 maturing ; fruit a drupe. 



L PRUNUS. 



Trees or shrubs, often spiny ; leaves serrate ; flowers mostly 

 in axillary clusters ; calyx 5-cleft, deciduous ; petals 5, spread- 

 ing ; stamens 15-25 ; style terminal ; fruit a drupe, exocarp 

 fleshy, smooth, endocarp hard and bony, somewhat rough- 

 ened, oval and compressed or subglobose. 



