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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. ManL 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, austrornontana 

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



Submont. — Alp, Je-S. 



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

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

 ciUate; 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 euneate, oblong-cuneate or spatulate, spine-tipped, glandular- 

 ciUate; 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, 

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

 tions: Greenl.— N.M. — Ariz.^Alaska; Eurasia. Alp.—Suhalp, Jl-Au. 



ft 



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, paltrately 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 folhcles 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 broadlv 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 glanduIar-cUiolate, 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, bhie or purple, much longer than 

 the sepals, narrowed into ciaw-Uke bases. Filaments subulate to triangular. 

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

 €rect, 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 ram. long, ciliate 

 all aroimd; 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. 



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