140 CRASSULACEJS. (ORPINE FAMILY.) 



Petals imbricated in the bud (rarely wanting), inserted, with the distinct 

 stamens, on the base of the calyx. Pistils distinct (united r.<elow in Pen- 

 thorum), usually with a little scale at the base of each, forming pods (folli- 

 cles) whu h open along the inner suture. Seeds anatropous : the straight 

 embryo surrounded by thin albumen. Flowers usually cymose, small. 

 Leaves chiefly sessile. 



Synopsis. 



* Pistils entirely separate. (True Crassulacese.) 



1. TILL^EA. Sepals, petals, stamens, and pistils 3 or 4, distinct. 



2. SEDUM. Sepals, petals, and pistils 4 or 6, distinct. Stamens 10-8. 



* * Pistils united below into a 5-celled many-seeded pod. 

 8 PENTIIORUM. Sepals 5. Petals commonly none. Stamens 10. Pod 5-beaked. 



1. TILI^A, L. TILL^A. 



Sepals, petals, stamens, and pistils 3 or 4. Pods 2 - many-seeded. Very 

 small tuft.xl annuals, with opposite entire leaves and axillary flowers. (Named 

 in honor of Tilli, an early Italian botanist.) 



1. T. Simplex, Nutt. Rooting at the base (l'-2' high); leaves linear 

 oblong ; flowers solitary, nearly sessile ; calyx half the length of the (greenish- 

 white) petals and the narrow 8-10-seedcd pods, the latter with a scale at the 

 base of each. (T. ascendens, Eaton.) Muddy river-banks, Nun tucket to E. 

 Penn. July - Sept. 



2. SEDUm, L. STONE-CROP. ORPINE. 



Sepals and petals 4 or 5. Stamens 8 or 10. Pods many-seeded ; a little 

 scale at the base of each. Chiefly perennial, smooth, and thick-leaved herbs, 

 with the flowers cymose or one-sided. (Name from sedeo, to sit, alluding to the 

 manner in which these plants fix themselves upon rocks and walls.) 

 It Flowers one-sided on the spreading brandies of the cyme, forming a sort of spike, 



mostly with 4 petals, frc. and 8 stamens, ichile the central flwer commonly Itas 5 



petals, $-c. ami 10 stamens. 



1. S. plllcliclllllll, Michx. Stems ascending (4' -12' high) ; leaves lin- 

 ear, nearly terete, scattered; spikes of the cyme several, densely flowered; pt-tais 

 rose-purple, lanceolate. Virgina to S. Illinois, ^Kentucky, and southward. 



2. S. tcrilfitlllll. (TIIHEE-LEAVED STONE-CROP.) Stems spreading 

 (3' -6 high); leaves jlat, the lower whorled in threes, wedyc-obocute., the upper 

 scattered, oblong; cyme 3-spiked, leafy ; petals u-hite, linear-lanceolate. Rocky 

 woods, Penn., to Illinois and southward. May, June. Also in gardens. 



# * Flowers in close cymes, uniformly IQ-androus: leaves flat. 



3. S. tclcpliioldcs, Michx. (WILD ORPINE or LIVE-FOR-RVEK.; 

 Stems ascending (6' -12' high), stout, leafy to the top; leaves oblong or oval, 

 entire or sparingly toothed, scattered; cyme small; j&tab Jtesh-cotor, ovate-lan- 

 ceolate, taper-pointed ; ;wx/s tapering into a slender style, Dry rocks, Alleghany 

 Mountains, from Maryland southward, and sparingly in New Jersey 1 W. New 

 Vork 1 and Indiana. June. 



