CRASSULACK.-K. (ORIMMC lAMILY.^ 171 



Styles 2. Pod inversely heart-shaiied or 2-l<)iK'(l, flMttciicd, very short, l-ccllcd, 

 with 2 parietal ])laceiit;B, 2-valved at tiie to]), iiiaiiy-see<led. — Low and small 

 smooth herl)S, with tender siieeulent leaves, and small solitary or leaty-eymed 

 flowers, (\iimc eoinixmnded uf xPv<t6s, f/oldoi, and ititXt]v, tlw siiUiii, prohahly 

 from some rcpntid nu'dieiual iiualities.) 



1. C. Americ^num, Seliweln. Stems slender, sjireadinj;- and forking; 

 leaves priueipally opposite, roundish or somewhat heart-shaped, obseurely ere- 

 nate-lobed; ftowcrs distant, ineonspieuous, nearly sessile (j;reenish tinyed with 

 yellower purple.) — Cold wet places: common northward. April, May. 



OuDEU 3(). CRASSUL.ACE.E. (Oiu-ine Family.) 



Succulent kerbs, with pcrfeclli/ si/mmetiical /lowers : viz. the petals and 

 pistils equalling the sepals in number (3 - 20), and the stamens the same or 

 double their number, — technically different from Saxifrageae only in this 

 complete symmetry, and in the carpels being quite distinct from each 

 other, but even this does not hold in two N. American genera. Also, in- 

 stead of a perigynous disk, there are usually little scales on the receptacle, 

 one behind each carpel. Fruit dry and dehiscent; the pods (follicles) 

 opening down the ventral suture, many- rarely few-seeded. — Stipules 

 none. Flowers usually cymose, small. Leaves mostly sessile, in Pentho- 

 rum not at all fleshy. 



* Nut succulent : the carpels united, forming a 5-colle(l pad. Transition to tlic Saxifrajro Fainiljr. 



1. Pfiilliorum. Sepals 5 Petals none. Stamens 10. Pod 5-l)L'akt'd, many-secilcd. 



• • Leaves, &c., thick and succulent. Carpels distinct. 



2. Tillcca. Sepals, petals, stamens, and pistils 3 or 4. Seeds few or many. 



3. Seduin. Sepals, petals, and iiislils 4 or 5. Stamens 10- S. Seeds many. 



1. PENTHORUM, Gronov. Ditch Stoxe-cuop. 



Sepals 5. Petals rare, if any. Stamens 10. Pistils .'j, united below, forming 

 a 5-angled, 5-horncd, and fj-eelled ])od, which ojjens by the falling off of the 

 Leaks, many-seeded. — Upright weed-like perennials (not fleshy like the rest of 

 tlie family), with scattered leaves, and yellowish-green flowers loosely spiked 

 along the upper side of the naked branches of the cyme. (Xame from tt(vt(, 

 Jive, and opos. n rule or mode, probaljly from the (juinary order of the flower.) 



1. P. sedoides, L. Leaves lanceolate, acute at both ends. — 0])en wet 

 places, everywhere. July - Oct. — Parts of the flower rarely in sixes or sevens. 



2. TILLJEA, L. T11.1..EV. 



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

 small tufted anuiuds, with opposite entire leaves and axillary flowers. (Named 

 in honor i)\' Mirhncl Ani/'to Tilli, an early Italian botanist.) 



1. T. simplex, Nntt. Rooting at the bjuse (l'-2' high) ; leaves linear- 

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

 white) petals and the narrow 8- lO-seeded pods, the latter with a scale at the 

 base of each. (T. asce'ndens, Eulon.j — MiuUy river-banks, Nantucket to Ma- 

 ryland. July -Sept. 



