SEDACEAE 497 



1. Lenophyllum Texanum (J. G. Smith) Eose. Plants 1.5-2 dm. tall: leaves 

 1.5-2.5 cm. long, the upper ones ovate to ovate-lanceolate: sepals oblong to oblong- 

 lanceolate, 2-3 mm. long: petals broadened above the middle, 4-5 mm. long or some- 

 times smaller: follicles inflated. 



In dry soil, near Corpus Christi, Texas. Summer and fall. 



3. DIAMORFHA Nutt. 



Annual or biennial slender herbs. Leaves alternate: blades nearly terete. 

 Flowers borne in corymbose cymes. Sepals 4 or 5, about as wide as long. Petals 4 

 or 5, pink or purple, not contracted below the middle. Stamens free. Carpels 4 or 5, 

 united to below the middle, wide-spreading in age. Spring. 



Petals oblong, about twice as long as wide: carpels long-tipped. 1. D. cymosa 



Petals ovate, slightly longer than wide: carpels short-tipped. 2. D. Smallii 



1. Diamorpha cymosa (Nutt.) Britton. Plants reddish, 2-10 cm. tall: leaves 

 2-5 mm. long; blades obtuse: sepals deltoid, about 1 mm. long: petals oblong, 3-3.5 

 mm. long: carpels lanceolate. 



In dry soil and rocks, North Carolina and Tennessee to Georgia and Alabama. 



2. Diamorpha Smallii Britton. Plants similar to those of D. cymosa but 

 more slender: sepals about 0.5 mm. long: petals ovate, 2-2.5 mm. long: carpels ovoid. 



On cliffs of the Yadkin River, middle North Carolina. 



4. RHODIOLA L. 



Perennial herbs with woody rootstocks. Leaves alternate: blades flat, sometimes 

 toothed. Flowers dioecious or polygamous, borne in a terminal cyme. Sepals 4 or 5, 

 decidedly longer than wide. Petals 4 or 5, yellowish, purplish or greenish. Follicles 

 erect. KOSEROOT. 



1. Rhodiola Roane'nsis Britton. Plants 1-4 dm. tall: leaf -blades elliptic, 

 narrowly cuneate or almost linear, 1-3.5 cm. long, entire or nearly so: sepals linear 

 to lanceolate, 1-1.5 mm. long: petals slightly broadened upward, 3-4 mm. long: 

 follicles 8-10 mm. long. [Sedum Eoanensis Britton.] 



On cliffs, Roan Mountain, North Carolina. Spring and summer. 



5. TETRORUM Hose. 



Annual diffuse herbs. Leaves alternate: blades nearly terete. Flowers perfect, 

 borne in cymes. Sepals 5, broader than long. Petals 5, white or pink. Follicles 4, 

 wide-spreading. 



1. Tetrorum pusillum (Michx.) Rose. Plants 512 cm. tall, pale green: leaves 

 2-9 mm. long; blades obtuse: sepals broadly deltoid: petals white or pink, ovate, 

 2.5-3 mm. long: follicles 3.5-4 mm. long. [Sedum pusillum Michx.] 



In dry soil or on rocks, North Carolina to Georgia. Spring. 



6. SEDUM L. 



Annual or perennial herbs. Leaves alternate, or sometimes opposite or whorled: 

 blades terete, angled or flat. Flowers perfect, borne in often 1-sided cymes. Sepals 

 4 or 5, usually much longer than wide. Petals 4 or 5, variously colored or white. 

 Follicles spreading. STONE CROP. 



Flowers in a terminal corymbose cyme. 1.5. telephoides. 



Flowers in simple or branched scorpioid cymes. 

 Corolla yellow. 



Plants perennial: leaf-blades ovate. 2. S. acre. 



Plants annual: leaf-blades oblong to linear-oblong. 3. S. Nuttallianum. 



Corolla white to purple. 



Plants annual or biennial: petals purple: leaf-blades linear. 4. S.pulchellum. 



32 



