1 68 CORNACEAE (DOGWOOD FAMILY) 



A, Leaf segments narrowly linear. W. E. — Common weed in meadows. 



D. pusUlus {wild carrot) 

 AA. Leaf segments lanceolate. W. — Cultivated for its yellow edible root. 



D. carota (cultivated carrot) 



CORNACEAE (Dogwood Family) 



Herbs or shrubs or trees. Leaves opposite, mostly entire, pinnately • 

 veined; stipules none. Flowers in cymes or heads or ament-like 

 clusters. Calyx limb 4-s-toothed or -lobed. Petals none or dis- 

 tinct, 4-5. Stamens 4, alternate with the petals. Ovary inferior, 

 i-2-celIed; ovules 1-2 ; styles 1-2. Fruit fleshy, a drupelet or a 

 berry. 



A. Leaves deciduous, herbaceous ; flowers perfect; petals present ; fruit a drupe. 



CORNTIS (p. 168) 

 AA. Leaves evergreen, coriaceous; flowers dioecious; petals none; fruit a berry. 



GAKRYA (p. 168) 



CORNUS (Dogwood) 



Herbs or shrubs or trees. Leaves entire, sometimes apparently whorled. 

 Flowers variously colored, in cymes or heads, often involucrate with- large 

 white bracts. Calyx limb minutely 4-toothed. Petals 4. Ovary 2-celled ; 

 style I. Drupe globose to oblong. Seeds 2. — (L. cornu = a horn; re- 

 ferring to the hardness of the wood.) 



A. Flowers in loose cymes, white or cream-colored, not involucrate; fruit white or 

 blue. 

 B. * Leaves s-io cm. long; calyx teeth prominent. 

 C. Cyme branches hairy; leaves loosely pubescent beneath. W. C. 



C. occidentalis (western dogwood) 

 CO. Cyme branches glabrous; leaves appressed-pubescent beneath. C. E. 



C. stolonifera (red-osier dogwood) 

 BB. Leaves 2.5-5 cm. long, acute at both ends; calyx teeth minute. U. 



C. glabrata 



AA. Flowers in sessile umbels, yellowish, involucrate; involucre bracts 4, 5-7 mm. 



long; fruit blue-black; shrub 3-4,5 m. high. U. C. sessilis 



AAA. Flowers in dense heads, greenish, involucrate; involucre bracts 4-6; fruit red. 



D. Plant 8-20 cm. high, herbaceous; involucre bracts 1-2 cm. long. W. C. E. 



C. canadensis (bunchberry) 

 DD. Plant 10-20 m. high, shrub or tree; involucre bracts 4-8 cm. long. W. C. 



C. nuttallii (plowering dogwood) 



GARRYA (Fever-bush) 



Shrubs ; bark greenish ; branchlets 4-angled. Leaves entire or undulate. 

 Flowers in ament-like clusters ; clusters axillary, pendulous, solitary or in 

 3's between the bracts. Calyx of the sterile flowers 4-parted; ovary none. 

 Calyx of the fertile flowers shortly 2-lobed or entire ; stamens none ; ovary 

 i-celled; styles 2. Berry blue or purple. Seeds 1-2. — (Honor of M. 

 Garry, of the Hudson Bay Company.) 



