72 ERICACE^. 



Suborder IV. MONOTROPE^. 

 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. VACCINIUM, Linnaeus. 



* Corolla ovoid or globose, 4'5-toothed: filaments sm,ooth; anthers 2-avmed on the hack 



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 pot 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 ohovoid or campanulate, 5- toothed: leaves'cvergreen , 8 



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



1. V; 'ulignosum, From a span to 3 or 4 f b. high: leaves thick and veiny. 



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



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



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



5. 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, 3 



Erect: leaves mostly not an inch long: flowers more numerous 3, 4, 5 



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



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



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



