SAXBFRAGACE-E. (SAXIFRAGE FAMILX.) 169 



or most, of the flowers changed into little tufts of green leaves ; petals all lanceo, 

 late and tapering into tlte claw. — Mount Katahdin, Maine [Sev. J. Blake) and 

 high northward. (Eu.) 



8. BOYKINIA^ Nutt. Boykinia. 



Calyx-tube top-shaped, coherent with the 2-celled and 2-beaked pod. Sta- 

 mens 3, as many as the deciduous petals, these mostly convolute in the bud. 

 Otherwise as in Saxifraga. — Perennial herbs, with alternate palraately 5-7- 

 lobed or cut petioled leaves, and white flowers in cymes. (Dedicated to the 

 late D)-. Boykin of Georgia. ) 



1. B. aconitifblia, Nutt. Stem glandular (6' -20' high); leaves deeply 

 5 - 7-lobed. — Mountains of S. W. Virginia, and southward. July. 



9. SULLIVANTIA, Torr. & Gray. Sullivantia. 



Calyx bell-shaped, cohering below only with the base of the ovary, 5-cleft. 

 Petals 5, entire, acutisU, withering-persistent. Stamens 5, shorter than the 

 petals. Pod 2-cclled, 2-beaked, many-seeded, opening between the beaks : the 

 seeds wing-margined, imbricated upwards. — A low and reclined-spreading per- 

 ennial herb, with rounded and cut-toothed, or slightly lobcd smooth leaves, on 

 slender petioles, and small white flowers in a branched loosely cymose panicle, 

 raised on a nearly leafless slender scape (6' -12' long). Peduncles and calyx 

 glandular : pedicels recurved in fruit. (Dedicated to the distinguished bryolo- 

 gist who discovered the only species.) 



1. S. Ohi6nis, Torr. & Gr. {Gray,ChlorisBm-.-Am.,pl.&.)—'Luaestons 

 cliffs, Highland County, Ohio, Svllivant; Wisconsin River, LapJiam. June. 



10. HEUCHEEA, L. Alum-root. 



Calyx bell-shaped ; the tube cohering at the base with the ovary 5-cIeft. Pet- 

 als 5, spatulate, small, entire. Stamens 5. Styles 2, slender. Pod 1-celled, 

 with 2 parietal many-seeded placentae, 2-beaked, opening between the beaks. 

 Seeds oval, with a, rough and close seed-coat. — Perennials, with the round 

 heart-shaped leaves principally from the rootstock ; those on the scapes, if any, 

 alternate. Petioles with dilated margins or adherent stipules at their base. 

 Plowers in small clusters disposed in a prolonged and narrow panicle, greenish 

 or purplish. (Named in honor of John Senry Heucher, a German botanist of 

 the beginning of the 18th century.) 



» Flowers small, loosely panicled : stamens and styles exserled : calyx regular. 



1. H. Tilldsa, Michx. Scapes (l°-3°high), petioles, and veins of the 

 acutely 7 - 9-lobed leaves beneath villous with rusty liairs ; caljrx 1 J" long ; petals 

 spatulate-linear, about as long as the stamens, soon twisted. — Eocks, Maryland^ 

 Kentucky and southward, in and near the mountains. Aug. - Sept 



2. H. Americana, L, (Common Alum-root.) Scapes (2° -3° high), 

 &c. glandular and more or less hirsute with short hairs ; leaves roundish, with 

 short rounded lobes and crenatc teeth ; calyx broad, 2" long, the spatulate petals 

 not longer than its lobes. — Kocky woodlands, Connecticut to Wisconsin and 

 southward. June. 



