General Key to the Families 13 



ORDER XIV. SANTALALES 



XXII. SANTALACE^. SANDALWOOD FAMILY 



Herbs, shrubs or trees; leaves entire, without stipules; flowers 

 solitary or clustered, axillary or terminal, calyx valvate in the 

 bud, its tube adnate to the base of the ovary ; fruit a drupe or nut, 

 the seed solitary, destitute of any proper seed-coat. 



I. COMANDRA. Nutt. 



1. C. pallida. A. DC. White Comandra. 



2. C. iivida. Richards. Sivamp Comandra. 



3. C. Richardsiana. Fernald. Green Comandra. 



XXIII. LORANTHACE^:. MISTLETOE FAMILY 



Chiefly shrubby plants parasitic on trees; leaves coriaceous, op- 

 posite regular, greenish, yellowish or olive-brown; flowers in 

 axillary or terminal clusters or solitary; fruit a berry with glu- 

 tinous pulp. 



I. ARCEUTHOBIUM. Bieb. 



i. A. americanum. Nutt. Witch's Broom. 



ORDER XV. POLYGONALES 



XXIV. POLYGONACE^E. BUCKWHEAT FAMILY 



Herbs, shrubs or trees with stipules in the form of sheaths above 

 the swollen joints of the stem; leaves simple, entire; flowers mostly 

 perfect, with a more or less persistent calyx; fruit an achene. 



I. ERIOGONUM. Michx. 



1. E. umbellatum. van majus. Benth. Tall Eriogonum. 



2. E. ovalifolium. Nutt. Silvery Eriogonum. 



3. E. androsaceum. Benth. Dwarf Eriogonum. 

 II. OXYRIA. Hill. 



i. O. digyna. (L.) Hill. Mountain Sorrel. 

 III. RUMEX. L. 



1. R. salicifolius. Willoiv-leaved Dock. 



2. R. Acetosa. L. Common Sorrel. (Introduced.) 



3. R. Acetosella. L. Field Sorrel. (Introduced.) 



