Order 60.— CRASSULACEiE. 367 



Thus 1. Chassulea Carpels distinct, forming a circlo of follicles, (a) 



a Flowers all 4-parted. Stamens 4 Till^IA. 1 



a Flowers all 4-parted. Stamens 8 BuYOPnTixtrM. 2 



a Flowers 5-parted, or 4 and 5-parted. Petals distinct, spreading. Sedfm. 8 



a Flowers 5-parted. Petals united below, erect, connivent ... Echeveeia. 4 



a Flowers 6 to 20-parted. Hypogynous scales laciniate Sempep.yi vum. 5 



Tribe 2. Diamobpiiej;. Carpels united into a many-celled capsule, (b) 



b Flowers 4-partcd. Sta-mens 8 Diamokpha. 4 



b Flowers 5-parted. Stamens 10 Penthop.um. T 



i. TILL£ A, Mx. Pigmy-weed. (To Michael Angelo Tilli, an 

 Italian botanist ; died 1 740.) Calyx of 3 or 4 sepals united at base ; 

 petals 3 or 4, equal ; stamens 3 or 4 ; capsules 3 or 4, distinct, follicu- 

 lar, opening by the inner surface, 2 or many-seeded. — (D Very minute, 

 aquatic herbs. Lvs. opposite. 



T. simplex Nutt. St. ascending or erect, rooting at the lower joints ; lvs. con- 

 nate at base, linear-oblong, fleshy ; fls. axillary, solitary, subsessile, their parts iu 

 4s; pet. oval or oblong; carpels 8 to 10-seeded. — Near East Rock, New Haven, 

 Ct. (Dr. Robbin's), and Philadelphia, on muddy banks, rare. St. 1 to 3' high. 

 Lvs. 2 to 3" long. Fls. as large as a pin's head. Petals oval, flat, acute, twice 

 as long as the oval, minute calyx, longer than tho stamens and fruit, and of a 

 greenish white color. Jl. Sept. 



2. BRYOPHYL'LUM, Salisb. (Gr. ppvu, to grow, (pvXXov, leaf; i. e., 

 germinating from a leaf.) Calyx inflated, 4-cleft scarcely to the middle ; 

 corolla monopetalous, the tube long and cylindrical, 4-sided and obtuse 

 at base ; limb in 4 triangular, acute lobes ; seeds many. — An ever- 

 green, fleshy, suffruticous plant, native of E. Indies. Lvs. opposite, un- 

 equally pinnate, part of them sometimes simple. Fls. greenish purple. 



B. calycinum Salisb. Not uncommon in house cultivation, requiring but 

 little water, in a well-drained pot of rich loam. St. thick, green, about 2f 

 high. Lvs. 3 to 5-foliate, with thick, oval, crenate Ifts. Fls. in a loose, terminal 

 panicle, pendulous, remarkable for the large, inflated calyx, and the long, tubular, 

 exserted corollas. — This plant is distinguished in vegetable physiology (see § 532), 

 producing buds and new plants from the margin of its leaves. 



3. SE r DUM, L. Stone Crop. (Lat. sedere, to sit; the plants, grow- 

 ing on bare rocks, look as if sitting there.) Sepals 4 or 5, united at 

 base ; petals 4 or 5, distinct, spreading ; stamens 8 to 10 ; carpels 4 to 

 5, distinct, many-seeded, with an entire scale at the base of each. — 

 Mostly herbaceous. Inflorescence cymous. Fls. mostly pentamerous. 



§ Flower of the branches 4-merous, central fl. 5-rnerous Nos. 1, 2 



§ Flowers all pentamerous. Spikes not umbellate Nos. 3—5 



1 S. ternatum Mx. Lvs. ternatety verticillate, obovaie, flat, smooth, entire, tho 

 upper ones scattered, sessile, lanceolate ; cyme in about 3 spikes ; fls. secund, tho 

 central one with 10 stamens, the rest with only 8. — If. Damp woods, Can. West, 

 Penn., the Southern and "Western States. Sts. 3 to 8' long, branching and de- 

 cumbent at base, assurgent above. Cyme with the 3 branches spreading and re- 

 curved, the white fls. loosely arrranged on their upper side. JL, Aug. f 



2 S. pulchellum Mx. Sts. branching at base, ascending; lvs. alternate, linear, . 

 obtuse, sessile with an auriculate base ; spikes umbellate, spreading, finally erect, 

 the crowded flowers unilateral, octandrous, the central fl. usually decandrous. — 

 On rocks and mts., Va. to da. and Tex. Sts. 4 to 12' high, very leafy. Fls. 

 closely sessile, small ; petals rose-color, acute. May, Jn. 



3 S. telephioides Mx. Lvs. broadly lanceolate, attenuate at base, subdeniate, 

 smooth ; cymes dense, corymbous ; sta. 10, the pet., sep. and carp, in 5s. — Found 

 on rocks, lake and river shores, N. Y., N. J., Harper's Ferry, Va., etc. St. a foot 

 high. Lvs. 1 to 2' long, § as wide. Fls. numerous, purple, in a terminal, branch- 

 ing cyme. Jn. — Aug. — Like the other species, very tenacious of life, and will 

 grow when pressed and apparently dried in the herbarium. 



