678 CISTACEAE (rOCKROSE FAMILY^ 



Fruiting calyx narrow, obovoid or pyriform ; leaves of the basal shoots 



g^reen ..... = . 8. Z. racemuloaa. 



Fruiting: calyx subglobose ; leaves of the basal shoots hoary -pubescent . 5. L. maritima. 

 Leaves of the basal shoots narrowly lanceolate to Unear. 

 Inner sepals l-nerved, usually exceeded by the narrow outer ones . . . 6. Z. tenuifolia. 

 Inner sepals ;3-nerved, equaling or longer than the outer. 

 Canescent-pubescent. 



Panicle strict, fastigiate, spire-like 4. Z. siricta. 



Panicle broadly pyramidal 5. Z. maritima. 



Green, more sparingly pubescent. 



Fruiting calyx depressed -globose, 2.5-3 mm. broad 3. Z. intermedia. 



Fruiting calyx obovoid, l.o-'i mm. broad 7. Z. Leggeitii. 



* Pubescence villous^ spreading ; leaves oblong ; flowers very short-pediceled, in 



cymulose clusters. 



1. L. vill5sa Ell. Stem upright, 3-7 dm. high, stout, simple, veiy leafy, 

 producing slender prostrate branches from the base ; leaves elliptical, mucro- 

 nate-pointed, alternate and opposite or sometimes whorled ; flowers densely 

 crowded ; pedicels shorter than the very small depressed-globose pod ; sepals 

 narrower than ttie valves of the capsule. {L. major Michx. , not L.) — Sterile 

 grounds, s. N. H. and s. Vt. to Fla. ; also from s. Ont. and O. to Neb., and 

 south w.^ common. 



* * Pubescence appressed; flowers open-paniculate. 



-t- Leaves comparatively short, broad, and thin. 



2. L. minor L. Erect, about 3-6 dm. high ; stem-leaves oval or oblong, 

 6-12 mm. long, commonly somewhat hairy, some whorled or opposite, those 

 of the rather crowded panicles more linear; pod obovoid-globose. (L. thymi- 

 folia Michx.) — Dry soil, s. N. H. and s. Vt. to Fla. and Miss. ; also s. Ont. and 

 Mich. 



•w- •»- Leaves firmer^ narrow, the cauline linear to slender-subulate ; panicles 

 more naked and racemiform. 



•w Fruiting calyx globular or broadly ovoid; pod nearly globose. 



S. L. intermedia Leggett. Rather strict, 3 dm. high or more, usually gla- 

 brate in age ; leaves of the basal shoots lanceolate, 3-^ mm. long, the cauline 

 linear-lanceolate, 1-2.5 cm. long; panicle elongated, subcylindrical ; pod large 

 for the genus, depressed-globose, 2-3 mm. in diameter. (L. minor Man. ed. 6, 

 in part.) — Dry soil, N. B. to e. N. Y. and Pa. ; also s. Ont., Mich., and Wise. 

 Passing to 



Var. juniperina (Bicknell) Robinson. Branches short, fastigiately appressed ; 

 leaves erect, mostly appressed ; pedicels short ; leafy panicle spire-like. {L. 

 juniperina Bicknell.) — Sandy soil, coast of s. Me., extending inland in the 

 Androscoggin and Saco valleys to n. N. H. 



4. L. stricta Leggett. Virgate, fastigiately branched, very pale with fine 

 appressed pubescence ; inflorei^cence close, spire-like; pod 1.7-2 mm. in diameter, 

 —-Borders of woods, etc., w. N. Y. to 111. and Minn. 



5. L. maritima Leggett. Stout and rigid for the genus, 3-5 dm. high, pale ; 

 leaves of the basal shoots lance-oblong, hoary-pubescent, thickish, those of the 

 stem and inflorescence linear or nearly so; panicle broadly pyramidal ; calyx 

 canescent-pubescent, globular in fruit; pedicels 0.5-1.5 mm", long. {L. minor, 

 var. Gray.) —Sandy soil near the coast, from the mouth of the Kennebec, Me., 

 to Ga. Passing inland to 



Var. interior Robinson. Lower (2-3 dm. high), more slender, thinner-leaved 

 and greener; pedicels filiform, 2-3 mm. long. — Open sandy places, s. N. H. to 

 w. Mass. — Distinguished from L, intermedia by its pyramidal inflorescence 

 and slightly smaller pods. 



6. L. tenuifblia Michx. Low, slender and diffuse, minutely pubescent oi 

 glabrous; loaves all srriall and very narrow; flowers mostly on very short pedi, 

 eels, diffusely racemose-paniculate ; one or both the narrow outer sepals exceed, 

 ing the inner ones, the latter strictly l-nerved; pod subglobose. — Dry sterile 

 soil, s. N. H. to Wis., Neb., and south w. 



