ERICACEAE. ^ 



Suborder IV. MONOTROPKZB. 



Herbs, parasitic upon roots: stems juicy, scaly- bract ed, not green. 



Stem striped, red or purple and white: sepals and bracts white. , .. 16 



Stem brown-red or purplish-red, clammy, hairy 17 



Stem very thick; entire plant bright red 18 



Stem white, tawny or reddish, fleshy; 19 and 20 polypetalous. 



Sepals 2 to 5, bract-like: petals 3 to 6, concave at base: style tubular 19 



Sepals and petals 4 or 5 each, lacerate-f ringed, flat 20 



Sepals 2 or 4, petals united; filaments and style hairy 21 



1. VACCINTUM, Linnams. 



Corotta ovoid or globose, 4-5 -tooths. d: filaments smooth; anther* 2-awned on (Ac back 



included', leaver deciduous. 



Flowers often 2 to 4 together; corolla usually 4-toothed, leaves entire 1, 2 



Flowers solitary, axillary: corolla usually 5- toothed: calyx not deeply lobed. 



Usually less than a foot high; leaves serrate 3, 4 



Usually several (1 to 12) ft. high; branches spreading 6, 6, 7 



* Corolla obovoid or campanulate, 6-toothed: leave* evergreen. 8 



* * Corolla deeply 4-parted, lobes reflexed, pale rose-color: leaves evergreen 9 



1. V. ulignosum, From a span to 3 or 4 ft. high: leaves thick and veiny. 



2. V. occidentale, Gr. Leaves thinner, less veiny: flowers mostly solitary. 



3. V. csespitosuxn, Michx. Branches not angled: berries blue. Very variable. 

 4; V. Myrtillus, L. var. microphyllum, Hooker. Branches sharply angled. 



5. V. xnyrtilloides, Hooker. Branchlets slightly angled: leaves serrulate, veiny. 



6. V. ovalifolium, Smith. Smooth, 4 to 12 ft high; branchlets angled. 



7. V. parvifoliuxii, Smith. Smooth; branchlets green, jointed, sharply angled. 



8. V. ovatuxn, Pursh. Rigid; leaves ovate or narrower, serrate: flowers clustered. 



9. V. oxycoccus, I*, var. intermedium, Gr. Trailing, slender; flowers umbellate, 



2. ARBUTUS, Tournefort. 



1. A. Menziesii, Punk. Leaves 3 to 5 inches long; corolla white, broad-ovoid. 



8. ARCTOSTAPHYLOS, Adanson. 



a. Seeds not united or easily separable. 



Low or creeping, rising only a foot cr two: flowers 1 or 2 lines long. 



Trailing or creeping, green, no bristly hairs, ovary and fruit glabrous. . 1, 2 



Erect: leaves mostly not an inch long: flowers more numerous 3, 4, 6 



Erect, 3-20 ft. high: flowers 3-4 lines long: fruit 4-5 lines thick. 6, 7, 8 



&, Seeds united into a solid woody or bony stone 9 to IS 



1. A, Uva-ursi, Spreng. Leaves oblong-spatulate, retuse, tapering to petiole. 



