SAXIFKAGACEAE 501 



1. Micranthea Virgini6nsis ( Michx. ) Small. Foliage pubescent. Leaf -blades 2-20 

 cm. long, ovate to obovate or spatulate, crenate or crenate-dentate, obtuse, each narrowed 

 into a winged petiole shorter or longer than the blade : scapes solitary or tufted, 1-4 dm. 

 tall strict : branches of the inflorescence much elongated at maturity : sepals as long as 

 the hypanthium, 1.5 mm. long, triangular, or triangular-ovate, sometimes nearly lance- 

 late, each terminating in a black gland : corolla white, 5-8 mm. broad : petals nearly equal, 

 3.5-6 mm. long, oblong or nearly so : filaments subulate: follicles distinct or nearly so, 

 4-5 mm. long, inflated. [Saxifraga Viryiniensis Michx.] 



On banks and rocks, New Brunswick to Minnesota, middle Georgia and Tennessee. Spring. 



2. Micranthes Texana (Buckl. ) Small. Resembling S. Virginiensis, but glabrous, 

 at least the inflorescence. Leaf-blades 1-2.5 cm. long, ovate or obovate, obtuse, entire or 

 shallowly toothed, sessile or short-petioled : scapes 0.5-1.5 dm. tall, sparingly branched 

 above : branches of the inflorescence terminating in congested cymules : sepals oblong to 

 ovate, slightly shorter than the hypanthium : corolla white, 4-6 mm. broad : petals nearly 

 equal, 2-3 mm. long, suborbicular or obovate : filaments subulate : follicles united at the 

 base, 3-4 mm. high, slightly surpassing the sepals, the style-beaks not diverging. [Saxi- 

 fraga Texana Buckl. ] 



On hillsides, Texas. Spring. 



3. Micranthes TennesseSnsis Small. Leaf-blades ovate or sometimes suborbicular, 

 2-6 cm. long, obtuse or rounded at the apex, but usually terminated by a tooth, coarsely 

 crenate-dentate, abruptly narrowed at the base ; petiole winged, longer or shorter than the 

 blade : scapes erect or assurgent, 1-2.5 dm. tall : branches of the panicles subtended by 

 linear or spatulate bracts : cymules open : sepals triangular-ovate, 1-1.5 mm. long, acute, 

 spreading, longer than the hypanthium : corolla white, 8-9 mm. broad : petals lanceolate, 

 3.5-4 mm. long, obtuse or slightly notched at the apex, sessile, or nearly so, each with 2 

 yellow spots and 2 lateral nerves which arise below the middle and converge at the apex : 

 filaments subulate, slightly longer than the sepals : follicles somewhat inflated, 4 mm. long, 

 distinct, each terminating in a slender divergent style-beak. [Saxifraga Tennessensi& 

 Small.] 



On rocky bluffs of the Tennessee River. Knoxville, Tennessee. Spring. 



4. Micranthes Careyana (A. Gray) Small. Leaf -blades broadly ovate or or- 

 bicular-ovate, 1-4 cm. long, obtuse, crenate, truncate or subcordate at the base ; petioles 

 slender, equalling the blades or thrice exceeding them in length : scapes erect, 1-2 dm. 

 tall, slender, paniculately branched above : pedicels filiform : sepals ovate, obtuse, spread- 

 ing : corollas white, 5-6 mm. broad : petals twice longer than the sepals, elliptic, faintly 

 bimaculate, rather cuneately narrowed at the base : filaments filiform-subulate : follicles 

 distinct or nearly so, 3-3.5 mm. long, widely spreading, each terminating in a slender 

 style-beak. [Saxi/raga Careyana A. Gray. ] 



On cliffs of high mountains, North Carolina and Tennessee. Spring. 



5. Micranthes Grayana (Britton) Small. Leaf-blades 2-12 cm. long, oblong, 

 oval or orbicular, crenate with mucronate teeth, truncate at the base or narrowed 

 into winged petioles which are usually shorter than the blades : scapes erect, 2-5 dm. 

 tall, paniculately branched, the branches widely spreading : sepals oblong or ovate-oblong, 

 2-2.5 mm. long, reflexed, obtuse, twice longer than the hypanthium : corolla white, 7-9 

 mm. broad: petals 5, the blades ovate or oblong-ovate, 3-3.5 mm. long, obtuse, strongly 

 bimaculate, contracted into stout claws : filaments club-shaped : follicles 4-6 mm. long, 

 united at the base, at length widely diverging : seeds oblong, 0.7-1 mm. long, strongly 

 papillose in lines. [Saxifraga Grayana Britton. S. Caroliniana A. Gray, not Schleich.] 



On banks and cliffs in the mountains of Virginia and North Carolina. Summer. 



6. Micranthes micranthidifolia (Haw.) Small. Leaf-blades oblong or oblanceo- 

 late, 1-3 dm. long, coarsely dentate, crenate or sometimes serrate, narrowed into broad 

 winged petioles : scapes erect, 2-9 dm. tall, usually solitary, paniculately branched, the 

 branches subtended by leaf-like bracts : pedicels slender or filiform : sepals oblong-lanceo- 

 late, obtuse, much longer than the hypanthium, reflexed : corolla white, 6-7 mm. broad : 

 petals oblong, surpassing the calyx : filaments club-shaped, longer than the petals : follicles 

 7-8 mm. long, united at the base, each terminating in a slender style-beak : seeds oblong- 

 elliptic, 1 mm. long, longitudinally ribbed. [Saxifraga erosa Pursh. ] 



In mountain brooks and swamps, Pennsylvania to Georgia and Tennessee. Spring and Bummer. 



4. SPATULARIA Haw. 



Perennial scapose herbs, with short rootstocks and glandular-pubescent foliage. 

 Leaves basal : blades narrow, broadened upward, coarsely or incisely toothed, with petiole- 

 like bases. Flowers perfect, in spreading panicles. Sepals 5, slightly united, recurved at 



