176 SAXIFKAGACE^. (SAXIFRAGE FAMILY.) 



7. R. floridum, L'Her. (Wild Black Currant.) Leaves sprinkled with 

 resinous dots, slightly heart-shaped, sharply 3 - 5-lobed, doubly serrate ; racemes 

 drooping, downj ; bracts longer than the pedicels ; flowers large, whitish ; calyx 

 tubular-bell-shaped, smooth ; fruit round-ovoid, black, smooth. — Woods, N. Eng. 

 to Va., west to Ky., Iowa, aud Minn. 



8. R. rilbrum, L., var. subglandulosum, Maxim. (Red Currant.) 

 Stems straggling or reclined ; leaves somewhat heart-shaped, obtusely 3-5- 

 lobed, serrate, downy beneath when young; racemes from lateral buds distinct 



from the leaf-buds, drooping , calyx flat (green or purplish) ; fruit globose, 

 smooth, red. — Cold bogs and damp woods, N. Eng. to N. J., west to Ind. and 

 Minn. 



§3. SIPH6CALYX. Thornless and prickless ; leaves convolute in the bud ; 

 racemes several -Jiowered ; cahjx-tube elongated; berry naked and glabrous. 



9. R. aureum, Pursh. (Missouri or Buffalo Currant.) Shrub 

 5-12° high, leaves 3 -5-lobed, rarely at all cordate; racemes short; flowers 

 golden-yellow, spicy-fragrant ; tube of salverform calyx (6" long or less) 3 or 4 

 times longer than the oval lobes ; stamens short ; berries yellow or black. — 

 Banks of streams, Mo. and Ark. to the Rocky Mts., and westward. Common 

 in cultivation. 



Order 36. CRASSULXcE^. (Orpine Family.) 



Succulent herbs, with perfectly symmetrical flowers ; viz., the petals and 

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

 double their rmmber, — technically different from Saxifrageas only in this 

 complete symmetry, and in the carpels (in most of the genera) being quite 

 distinct from each other. Also, instead 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. FloAvers usually cymose, small. 

 Leaves mostly sessile, in Penthorum not at all fleshy. 



* Not succulent ; the carpels united, forming a 5-celled capsule. 



1. Penthorum. Sepals 5. Petals none. Stamens 10. Pod 5-beaked, many-seeded- 



* * Leaves, etc., thick and succulent. Carpels distinct. 



2. Tillaea. Sepals, jietals, stamens, and pistils 3 or 4. Seeds few or many. 



3. Sedum. Sepals, petals, and pistils 4 or 5. Stamens 8 - 10. Seeds many. 



1. PENTHORUM, Gronov. Ditch Stone-crop. 



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

 a 5-angled, 5-horned, and ."j-celled capsule, which opens by the falling off of the 

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

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

 along the upper side of the naked branches of the cyme. (Name from TreVre. 

 fve, and opos, a mark, from the quinary order of the flower.) 



1. P. sedoides, L. Leaves lanceolate, acute at both ends. — Open wet 

 places , N. Brunswick to Fla., west to Minn., E. Kan., and Tex. July - Oct. 

 Parts of the flower rarely in sixes or sevens. 



