294 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



4. Sedum wootoni Britton, Bull. N. Y. Bot. Gard. 3: 44. 1903. 



Type locality: Organ Mountains, New Mexico. Type collected by Wooton. 



Range: New Mexico and Arizona. 



New Mexico: Santa Fe and Las Vegas mountains; Sandia Mountains; Hillsboro 

 Peak; Organ Mountains; WTiite Mountains. Rocky cliffs of the mountains, in the 

 Transition Zone. 



5. Sedum griffithsii Rose, N. Amer. Fl. 22: 71. 1905. 

 Type locality: Santa Rita Moim tains, Arizona. 

 Range: Southern Arizona and New Mexico. 



New Mexico: Bear Mountain; Tularosa River, Socorro County; Burro Moimtains; 

 San Luis Mountains; Organ ^Mountains. Transition Zone. 



6. Sedmn stenopetalum Pursh, Fl. Amer. Sept. 324. 1814. 

 Sedum lanceolatum Torr. Ann. Lye. N. Y. 2: 205. 1827. 



Sedum stenopetalum ruhrolineatxira Cockerell, Bull. Torrey Club 18: 169. 1891. 

 Type locality: "On rocks on the banks of Clarck's river and Kooskoosky." 

 Range: Alberta and Nebraska to California and northern New Mexico. 

 New Mexico: Upper Pecos {Maltby & Coghill 183). 



59, SAXIFRAGACEAE. Saxifrage Family. 



Perennial herbs with more or less scapelike flower-bearing stems; leaves mostly 

 basal in a rosette about a shortened and thickened or slender and elongated axis; 

 leaves simple, entire, toothed, or lobed, the cauline, when present, of slightly dif- 

 ferent shape; flowers perfect, solitary or in simple or paniculately branched cymes; 

 hypanthium usually well developed, of various shapes; flowers 5-parted, rarely 

 4-parted; stamens as many or twice as many as the sepals; gynoecium of 2 (rarely 

 3 or 4) cari^els; ovary partially or wholly inferior; fruit of capsules or follicles. 



key to the genera. 



Placentae parietal, sometimes nearly basal. 



Flower stalk lateral from a stout scaly rootstock; 



gyncEcium 2-carpellaiy 1. Heuchera (p. 294). 



Flower stalk axial from a slender bulbiferous root- 

 stock ; gynoecium 3-caipellary 5. Lithophraoma (p. 297). 



Placentae axial. 



Hypanthium well developed, accrescent, at ma- 

 turity longer than the sepals; leaves 5-lobed. . 2. Saxifraga (p. 296). 

 Hypanthium only slightly developed, unchanged 

 at maturity; leaves not lobed. 

 Inflorescence scapiform, not leafy nor bracteate. 3. Micranthes (p. 296). 

 Inflorescence leafy and bracteate 4. Leptasea (p. 297). 



1. HEUCHERA L. Alum root. 



Cespitose perennials with mostly basal, broadly oval to rotund, cordate leaves 

 arising from the thickened rhizomatous steins, these covered by the bases of the 

 petioles; flowers in elongated, scapelike, nari'ow or spreading panicles, dull greenish 

 white or rose-purplMi ; calyx tube turbinate or campanulate, the limb 5-parted; 

 petals entire, small; stamens 5; styles 2; capsule 2-beaked, about half inclosed in 

 the calyx tube. 



