72 ERICACEAE. 



Suborder IV. MONOTROPE.SL 



Herbs, parasitic upon roots: stems juicy, scaly- bracted, 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-fringed, flat 20 



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



1. VACCINTUM, Linnaeus. 



* Corolla ovoid or globose, 4-5-toolhed: filaments smooth; anthers S-awned on the, 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 5, 6, 7 



* * Corolla olovoid or campanulate, 5- toothed: leaves evergreen 8 



* * * Corolla deeply 4-paried, lobes rejlexed, pale rose-color: kavea 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. caespitosum, Michx. Branches not angled: berries blue. Very variable. 



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



6. V. myrtilloides, Hooker. Branchlets slightly angled: leaves serrulate, veiny . 



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



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



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



9. V. oxycoccus, L. var. intermedium, Gr. Trailing, slender: flowers umbellate. 



2. ARBUTUS, Tournefort. 



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



3. 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 



5. Seeds united into a solid woody or bony stone 9 to 12 



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



