52 MISSOURI BOTANICAL GARDEN. 
the three American species two extend from the northern 
Atlantic States west to the Rocky Mountains and one is 
Mexican. They are mostly low, slender-branched shrubs, 
few of them reaching the height of 1.5 m. and most re- 
semble the preceding group in habit and smallness of foli- 
age; winter buds small, consisting of several pairs of 
outer scales, except in LZ. gracilipes which has only one 
pair of outer scales; the bractlets are small and con- 
nate into pairs or wanting, only Z. ramosissima has 
bractlets connate into a cupula as high as the ovaries; 
calyx small with short rounded lobes or nearly truncate ; 
corolla tubular-campanulate with unilaterally ventricose or 
gibbous tube and 5-lobed upright or slightly spreading 
limb, somewhat indistinctly bilabiate in Z. microphylla ; 
style pilose or glabrous; ovaries connate or distinct, 2-celled, 
except in L. saccata; fruit orange red or scarlet or dark 
blue in L. obovata. The flowers appear early in spring in 
the axils of the lower leaves or even the basal bracts of the 
branches, and are white or yellowish-white, usually tinged 
with red or pink or entirely purple or pink. The group 
shows relation to the Microstylae, Coeruleae and Pyre- 
naicae. 
A. Bractlets large, connate into a lobed cupula as high as the ovaries; 
bracts ovate-oblong, twice as long as the distinct ovaries; corolla 
slender, 12-16 mm. long; leaves oval to ovate, pubescent, 1-2 cm. 
long. . 9. L. ramosissima, Franch. & Sav. 
AA. Bractlets in pairs, scarcely one-third as high as the ovaries, or 
wanting, 
B. Ovaries wholly or partly connate. 
C. Bractlets present, 
D. Corolla hairy outside, dull purple, gibbous at the base, 
about 15 mm. long; bracts narrow, as long or longer 
than ovaries; leaves oval to elliptic-oblong, acutish, 
pubescent, 2-4 cm. long. 10. L. purpurascens, Walp. 
DD. Corolla glabrous without, yellowish-white or tinged pink, 
scarcely 1 cm. long. 
ES 
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