SAXIFRAGE FAMILY 391 



3-3.5 mm. long, glabrous; petals deep yellow, oblong, 4-4.5 mm. long, more or 

 less erose at the apex. S. Van-Bruntiae Small. Along mountain streams: Alta. 

 B.C. Mont. Jl-S. 



4. L. austromontana (Wiegand) Small. Leaves of the caudices 7-14 mm. 

 long, parchment-like, crowded, but more or less spreading, the blades narrowly 

 lanceolate to subulate, slenderly spine-tipped, ciliate; flower-stalks 8-15 cm. 

 tall, glabrate or finely glandular-pubescent; sepals ovate, 1.5-3 mm. long, glabrous 

 or sparingly ciliate, obtuse; petals white, often yellow-spotted, oblong to oblong- 

 lanceolate, 5-6.5 mm. long. Saxifraga bronchialis Am. auth. S. austromontana 

 Wiegand. S. cognata E. Nels. On rocks: Alta. B.C. Wash. Utah N.M. 

 Submont. Alp. Je-S. 



6. L. tricuspidata (Retz.) Haw. Leaves of the caudices 7.5-21 mm. long, 

 parchment-like, crowded, spreading, the blades linear to cuneate-linear, 3-toothed, 

 ciliate; flower-stalks 5.5-18 cm. tall, sometimes sparingly glandular-pubescent, 

 sepals ovate, 1.5-3 mm. long, obtuse, ciliate; petals white, oblong-elliptic to oval; 

 6-7 mm. long. S. tricuspidata Retz. Arctic regions or high mountains: Greenl. 

 Lab. Mich. Alta. 'Alaska. Arctic-Alp. Jl-Au. 



6. L. flagellaris (Willd.) Small. Leaves of the caudices 7-16 mm. long, 

 crowded, more or less spreading, some of them subtending slender arching off- 

 sets, the blades cuneate, oblong-cuneate or spatulate, spine-tipped, glandular- 

 ciliate; flower-stalks 4-15 cm. tall, glandular-pubescent, 1-f ew-flowered ; sepals 

 ovate or oblong-ovate, 4-5.5 mm. long, glandular-ciliate, obtuse; petals yellow, 

 cuneate or obovate, 6.5-9 mm. long. S. flagellaris Willd. Alpine-arctic situa- 

 tions: Greenl. N.M. Ariz. Alaska; Eurasia. Alp. Subalp. Jl-Au. 



23. HETERISIA Raf. 



Perennial caulescent herb with a short caudex. Leaves alternate, but ap- 

 proximate, mostly near the base, with thin membranous stipules; blades some- 

 what fleshy, palnrately lobed; lobes 3-toothed. Flowers in open cymes, often 

 replaced by bulblets. Hypanthium flat. Sepals 5, ovate to oblong, strongly 

 reflexed. Corolla white, regular; petals 5, ovate with a narrow claw. Stamens 

 10; filaments clavate. Ovary slightly inferior, the carpels united below the 

 middle. Fruit nodding, the tips of the follicles spreading or slightly recurved. 



1. H. Mertensiana (Bong.) Small. Leaves 4.5-21 cm. ^long, the blades 

 suborbicular to reniform, deeply cordate at the base, glabrous, shallowly lobed, 

 the lobes usually broadly 3-toothed; scapes 11-32 cm. tall, sparingly pubescent, 

 bright green, paniculately branched; cy mules mainly reduced to bulblets along 

 the slender peduncles, terminating in a single flower; sepals oblong to oblong- 

 ovate, 2-3 mm. long, sometimes glandular-ciliolate, usually glabrous, reflexed; 

 petals white, 3-4 mm. long. Saxifraga Mertensiana Bong. S. heterantha Hook. 

 Mountains: Alaska Alta. Mont. Ida. Calif. Mont. My-Jl. 



24. ANTIPHYLLA Haw. PURPLE OR MOUNTAIN SAXIFRAGE. 



Perennial caulescent densely matted herbs, with copiously leafy stems and 

 sterile branches, and naked or sparingly leafy flower-stalks. Leaves opposite, 

 except sometimes on the flower-stalks, often 4-ranked, imbricate; blades rela- 

 tively broad, conspicuously ciliate, mostly with an almost apical pore, keeled, 

 sessile. Flowers solitary, erect. Hypanthium shorter than the calyx. Sepals 

 5, strongly ciliate. Corolla regular; petals 5, blue or purple, much longer than 

 the sepals, narrowed into claw-like bases. Filaments subulate to triangular. 

 Ovary more than half superior, the carpels united to above the middle. Follicles 

 erect, with more or less spreading tips. 



1. A. oppositifolia (L.) Fourr. Plants in dense mats; leaves densely imbri- 

 cate, 4-ranked, the blades obovate to spatulate, 3-5 mm. long, ciliate, keeled; 

 flower-stalks 1-3 cm. long, leafy; sepals oblong to ovate, 2.5-3 mm. long, ciliate 

 all around; petals elliptic to oval, 8-9 mm. long. Saxifraga oppositifolia L. 

 Rocks and stony places: Greenl. Vt, Wyo. B.C. Alaska; Eurasia. Mont. 

 Alp. Je-Au. 



