36 CISTACE.E. (ROCK-ROSE FAMILY.) 



* Flowers (dike, solitary: petals Conspicuous: stamens indefinite: capsule 



many-seeded. 



1. H. Carolinianum, Michx. Hirsute; leaves lanceolate, denticulate., 

 acute, short-petioleil, the lowest obovate, crowded ; flowers large, solitary, 

 borne above tbe axils. Dry sandy soil, Florida to North Carolina and west- 

 ward. March -April. Stems 6' -12' high, amending from a shrubby base. 

 Flowers 1' wide. 



2. H. Georgianum, n. sp. Tomentosa ; stem 6' - 9' high, much branched 

 from near the base; leaves lauceola.e, flat, or the margins slightly revolute, 

 6" -9" long; flowers all single and opposite the leaves, or J he uppermost 

 racemose, the slender pedicels 2-3 times as long as the calyx ; petals 3" - 4" 

 Inn.;. Fields and pastures. Bainbridge, Georgia, Mobile (Mohr). May- 

 June. 



3. H. arenicola, Chapm. Hoary ; leaves sma 1, lanceolate, - btuse, entire, 

 with the sides revolute ; flowers solitary, or 2-4 in terminal umbellate clus- 

 ters, on slender pedicels. Drifting sands near the coast, West Florida. 

 March - April. Stems shrubby and branched at the base, all but the short 

 (2'- 6') flowering stems buried in the sand. Flowers 3' wide. 



# * Flowers of two kinds : the earliest an in the last section, the later ones 

 smaller, clustered, with small petals, or none, fewer stamens, and few- 

 seeded capsules, 



4. H. COrymbOSUm, Michx. Tomentose and hairy ; stems erect, shrubby 

 at the base ; leaves lanceolate, obtuse, entire, hoary beneath, with the sides 

 revolute ; flowers nearly sessile in a rymose cluster at the summit of the stem, 

 the earlier ones long-peduncled ; sepals woolly. Dry sands near the coast, 

 Florida to North Carolina. April. Stems 1 high. Capsule smooth. 



5. H. Canadense, Michx. Stem soon branching above, tomentose, and 

 sparselv pilose; leaves lanceolate, mostly obtuse, short-petioled, rather sca- 

 brous above, canescent-tomeutose beneath, the margins revolute; primary 

 flowers large (!' wide), solitary, the calyx pilose, later ones very small, clus- 

 tered, tomentose. Dry soil in the middle districts. April. Stem 6' -12' 

 high Leaves 9" - 1 2" long. 



6. H. rosmarinifolium, Pursh. Tomentose ; stem strictly erect, sim- 

 ple below, with short flowering branches above, 10' -15' high, loaves linear, 

 1' long, the margins revolute ; earlier flowers single, long-pedicelled, i' wide, 

 the later in axillary clusters, }," long. Louisville, Georgia (31. H. Hopkins, 

 whose observations on this genus have afforded me valuable aid). 



2 LECHEA, L. PINWEED. 



Petals 3, persistent, not longer than the sepals. Stamens 3-12. Stig- 

 mas 3, plumose, sessile. Capsule oval or globose, 3-valved, incompletely 

 3-celled, 3 - 6-seeded. Embryo slightly curved. Perennial herbs branching 

 above, and later at the base in the form of barren leafy shoots, with entire 

 leaves, and small mostly greenish flowers in panicled bracted racemes. 



