

.V 



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384 



C. 0. Rosendah!. 



a natural hybrid between M. nuda and M. diphylla^ and for that reason 

 it seems hardly necessary to regard it as of higher rank than here accorded 

 to it. 



6. Mitella caulescens Nutt. T. et G. Fl N. Am. \: 586. 1840. 



Mitellastra caulescens (Nutt.) Howell, Fl. N. W. Am. 201. 1898. — Rhi- 

 zomes creeping or ascending, producing long, slender, leafy runners; flower- 

 ing stems erect, slender, 1.2—3.5 dm. high, bearing 1—3 petioled leaves, 

 thinly glandular-pubescent or hirsute; leaves round-cordata to reniform, 

 conspicuously 3 — 5-lobed, crenate or crenate-dentate, thin, sparsely hirsute 

 on both sides, becoming nearly glabrous in age, 2—7 cm. long, 2 — 7 cm. 

 wide; cauline leaves and leaves of the runners smaller; petioles slender 

 sparsely retrorse-hirsute, 4 — 12 cm. long; raceme 5 — 10-flowered, 3 — 10 cm. 

 long, glandular-puberulent; bracts minute, triangular, glandular-toothed; 

 pedicels slender, deflexed in bud, 2 — 8 mm long; flowers yellowish green, 

 9 — 12 mm. across in anthesis; sepals ovate triangular, spreading, 1.8 — 2 mm. 

 long; petals yellowish green, often purplish towards the base, pectinate- 

 pinnatifid with slender divisions, minutely glandular, 3 — 4 mm. long; sta- 

 mens 1.2 — 1.7 mm long, filaments slender, often purple, anthers cordate; 



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disk lining the hollow axis; ovary nearly half-inferior, puberulent, styles 

 slender, divergent, stigmas simple, rounded, ovules very small and nume- 

 rous; capsule globose-ovoid, prominently 2-beaker; seeds large, black and 

 shiny. 



In shady woods and moist places mostly at altitudes of 2,000 to 4,000 

 feet, from southern British Columbia and Vancouver Island to northern 

 California, and from northwestern Montana and northern Idaho south to 

 the middle of western Idaho. 



7. Mitella Breweri A Gray, Proc. Am. Acad. 6: 533. 1865. — P^c- 

 tiantia Breweri (A. Gray) Rydb. N. Am. Fl. 22: 2. 93. 1905. — Rhizome 

 slender, creeping, sometimes producing stolon-like ofl^sets; flowering steins 

 very slender, naked, sparsely glandular-pubescent, becoming glabrous m 

 age, 1—2.2 dm. high; leaves all basal, orbicular to reniform, with a broad 

 sinus at the base, and with many rounded lobes, incisely and doubly cre- 

 nata, thin, with a few scattered hairs on both sides, becoming glabrous 

 2.5—7 cm. long, 3 — 8 cm. broad; petioles stoutish, shaggy, reddish-hirsute 

 becoming quite glabrous in age, 4—12 cm. long; inflorescence a simple 

 raceme or more often racemose with numerous 2-flowered cymes, glandular- 

 puberulent, 5— 10 cm. long, 10— 25-flowered; bracts obovate, glandular- 

 fringed; pedicels 1 — 4 mm long with 2 minute bracteoles at the base, 

 flowers greenish yellow, 7 — 9 mm. across in anthesis; axis saucer-shaped j 

 sepals triangular, spreading, slightly reflexed at the tips, about 1 tnm. 

 long; petals pectinate-pinnalifid, 2— 3 mm. long, the 5—7 lobes filiform) 

 disk 5-lobed; stamens 5, opposite the sepals, very short, anthers cordate, 

 ovary half inferior, styles strongly spreading, stigmas 2-lobed; capsue 



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