474 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



Order 38. UMBELLALES. 



KEY TO THE FAMILIES. 



Fruit dry, a cremocarp; gynoecium 2-carpellary; stig- 

 mas terminal 104. APIACEAE (p. 475). 



Fruit drupaceous or baccate; gynoecium 1 to several- 

 carpellary, if 2-carpellary the stigmas introrse. 

 Ovule with a dorsal raphe; leaves mostly oppo- 

 site, the blades entire or merely toothed. .102. CORNACEAE (p. 474). 

 Ovule with a ventral raphe; leaves mostly alter- 

 nate, the blades compound 103. HEDERACEAE (p. 475). 



102. CORNACEAE. Dogwood Family. 



Trees or shrubs with simple, entire, mainly opposite, exstipulate leaves and perfect 

 or unisexual flowers in spikes or cymes; calyx lobes minute; petals and stamens 4, 

 epigynous; ovary inferior, becoming a 1 or 2-seeded drupe or berry, sometimes dry at 

 maturity. 



KEY TO THE GENERA. 



Flowers perfect, cymose; leaves deciduous 1. Cornus (p. 474). 



Flowers dioecious, spicate; leaves evergreen 2. Garrya (p. 474). 



1. CORNUS L. Cornel. 



Shrub 1 to 2 meters high with reddish branches; leaves elliptic-ovate, entire, short- 

 petioled, thin, deciduous; flowers white, perfect, in flat-topped cymes, without 

 involucres; fruit white. 



1. Cornus instolonea A. Nels. Bot. Gaz. 53: 224. 1912. 



Svida stolonifera riparia Rydb. Bull. Torrey Club 31: 573. 1904. 



Type locality: Crystal Creek, Colorado. 



Range: Alaska and Montana to Arizona and Nebraska. 



New Mexico: Cedar Hill; Tunitcha Mountains; Chama; Santa Fe and Las Vegas 

 mountains; Zuni; Sandia Mountains; Mogollon Mountains; "White and Sacramento 

 mountains. Along streams and in wet ground, in the Transition Zone. 



The leaves of the shrub vary in outline from broadly ovate and abruptly short- 

 acuminate to lanceolate and long-acuminate, and the base may be either broadly 

 rounded or somewhat narrowed. 



2. GARRYA Dougl. 



Evergreen shrubs from 50 cm. to over 3 meters high, with elliptic to ovate, entire, 

 short-petioled, coriaceous leaves and dioecious flowers in loose drooping axillary 

 spikes; petals wanting; calyx 4-merous in the staminate flowers, with 4 stamens, 

 2-lobed or obsolete in the pistillate flowers; ovary 1-celled, with 2 persistent styles; 

 fruit a blue black berry 5 mm. in diameter or less, becoming dry. 



KEY TO THE SPECIES. 



Mature leaves glabrous; plants mostly 2 to 3 meters high 1. G. wrightii. 



Mature leaves densely pubescent; plants low, usually less than 1 



meter high 2. G. goldmanii. 



1. Garrya wrightii Torr. U. S. Rep. Expl. Miss. Pacif. 4: 136. 1856. 



Type locality: Copper Mines, New Mexico. Type collected by Wright (no. 1789). 



Range: Western Texas to Arizona. 



New Mexico: Mogollon and Magdalena mountains, to the Organ and White moun- 

 tains and southward. Dry hills and canyons, in the Upper Sonoran Zone. 



