2S6 



ROSACEAE. 



Vol. II. 



10. 



Rosa rubiginosa L. Sweetbrier. Fig. 2316. 



Kosu rubiiiiiiosa L. Mant. 2: 564. 1771- 



Rosa micrimllui I. li. Smith, Eng. Bot. pi. 2490. 



Rosa eghuucna Mill. Diet. Ed. 8, no. 4. 1768. Not L. 1753. 



Slender, 4-6 high, or often forming longer wands, armed 

 with stout recurved prickles. Stipules rather hroad ; rachis 

 of the leaves glandular; leaflets 5-7, generally doubly serrate 

 and densely glandular-pubescent and resinous beneath, very 

 aromatic; flowers pink varying to white; caly.x-lobcs lanceo- 

 late, usually much lobed, spreading, deciduous, glandular- 

 hispid ; fruit oval or ovoid, 6"-io" long. 



In thickets, pastures and waste places, Nova Scotia to Ontario, 

 Tennessee, Virginia and Kansas. Adventive or naturalized from 

 Europe ; native also in central Asia. June-July. The Eglantine 

 of Chaucer, Spenser and Shakspere. Hip-rose. Hip-brier. Bede- 

 guar. Primrose. Kitchen-rose. 



Rosa gallica L., occasionally escaped from cultivation, differs 

 in having weak slender prickles and much larger leaflets ; it is 

 native of Europe. 



Rosa cinnamomea L., the cinnamon rose, of Europe and Asia, 

 with small doulile reddish flowers, and leaves downy-pubescent 

 beneath, is occasionally found along roadsides in the Eastern and 

 Middle States. 



II. Rosa bracteata Wendl. Evergreen Rose. Fig. 2317. 



Rosa bractcala Wendl. Bot. Beob. 50. 1798. 



A shrub with dark green, evergreen leaves, the stems and 

 branches diffuse or spreading, sometimes 18 -20 long, armed 

 with recurved prickles. Leaflets 5-1 1, obovate or oval, V-l' long, 

 often wedge-shaped at the base, notched, truncate or apiculate 

 at the apex, serrate, shining above ; flowers solitary or few 

 together; calyx-lobes acuminate, reflexed when old, persistent; 

 petals white to yellow, retuse or notched; styles separate; fruit 

 about i' in diameter. 



Woods and waste places, Virginia to Florida, Tennessee and Mis- 

 sissippi. Naturalized from China. April-June. 



Family 55. MALACEAE Small, Fl. SE. L'. S. 529. 1903. 

 Apple Family. 

 Trees or shrubs, with alternate pinnately veined or pinnate petioled leaves, 

 the small deciduous stipules free- from the petiole. Flowers regular, perfect, 

 racemed, cymose or solitary. Calyx mostly 5-toothed or 5-lobed, its tube (hypan- 

 thium) adnate to the ovary. Petals mostly 5, usually clawed. Stamens numerous 

 or rarely few, distinct ; anthers small, 2-celled, the sacs longitudinally dehiscent. 

 Ovary 1-5-celled, usually 5-celled, composed of 1-5 wholly or partly united carpels, 

 borne within the hypanthium and adnate to it ; ovules 1-2 (rarely several) in each 

 carpel, anatropous, ascending; styles 1-5; stigma small. Fruit a more or less 

 fleshy pome, consisting of the thickened calyx-tube enclosing the bony papery or 

 leathery carpels. Endosperm none ; cotyledons fleshy. 



About 20 genera and probably not fewer than 500 species, of wide geographic distribution 

 Ripe carpels papery or leathery. 



Leaves pinnate. i. 



Leaves simple, entire, toothed, or lobed. 



Cavities of the ovary (carpels) as many as the styles. 



Flesh of the pome with grit-cells. 2. 



Flesh of the pome without grit-cells. 



Cymes simple ; trees. 3, 



Cymes compound : low shrubs. 4. 



Cavities of the ovary becoming twice as many as the styles. ' 5, 



Ripe carpels bony. 



Ovule I in each carpel, or if 2, dissimila". 6. 



GAfules 2 in each carpel, alike. 7. 



Sorbus. 



Pyrus, 



Mains. 



Aronia. 



Atuclauchicr. 



Crataegus. 

 Cotoneastcr, 



