J 70 SAXIFRAOACEiE. (SAXIFRAGE FAMILY.) 



♦ * Flowers larger: cali/r {3" - 4" long) more or less oblique: stamens short: panicle 

 verj/ uanvir: leaves rounded, stif/lgli/ 5-9-lobed. 



3. H. hispida, Pmsh. J/ispid or hirsute witli lony; spreading hairs (oc- 

 casionally almost ylabioiis), scaiTcly glandular ; sfamfins soon exseilid, longer than 

 the spatulute petals. (H. Ilichardsonii, R. Br.) — Mountains of Virginia. Also 

 Illinois (Dr. Mead) and northwestward. May -July. — Scapes 2° -4° hi-h. 



4. H. pub6scens, Pursh. Scape (l°-3° high) and petioles .9ran«/ffr- 

 puhiscoit or glandular above, not hairy, below often glabrous ; stamens shorter than 

 the lobes of the calyx and the spatulatc petals. — Rich woods, Lancaster, Penn. to 

 Virginia and Kentucky, along the mountains. June, July. 



11. MITIJLLA, Tourn. Mitre-wokt. Bisiiop's-Cap. 



Calyx short, coherent with the base of the ovary, 5-clcft. Petals .5, slender, 

 pinuatilid. Stamens 10, included. Styles 2, very short. Pod short, 2-beaked, 

 1-celled, with 2 parietal or rather basal several-seeded placenta;, 2-valvcd at the 

 summit. Seeds smooth and shinin*g. — Low and slender perennials, with round 

 heart-shaped alternate leaves on the rootstock or runners, on slender petioles ; 

 those on the scapes, opposite, if any. Flowers small, in a simple slender raceme 

 or spike. (Name a diminutive from ixirpa, a mitre or cap, alluding to the form 

 of the young pod.) 



1. M. diphylla, L. Ilairij, leaves heart-shaped, acute, somewhat 3-5- 

 loI)ed, toothed, those on the niany-Jlowered-scape 2, opjwsite, nearly sessile. — Hill- 

 sides in rich woods : common, especially westward and northward. May. — 

 Flowers white, in a raceme 6' -8' long. 



2. M. nuda, L. Small and slender; leaves rounded or kidney- form , dQcjAy 

 and doubly crcnate ; scape usually leafless, feiv-flowered, very slender (4'- 6' 

 high). (M. cordifolia. Lam. M. prostrata, Michx.) — Deep moist woods in 

 moss, Maine to Penn., III., and northward. May -July. — A delicate little 

 plant, sending forth runners in summer. Blossoms greenish. 



12. TIARELLA, L. False Mitre-wort. 



Calyx bell-shaped, nearly free from the ovary, 5-partcd. Petals 5, with claws, 

 entire. Stamens 10, long and slender. Styles 2. Pod membranaceous, 1-celled, 

 2-valved; the valves unequal. Seeds few, at the base of each parietal placenta, 

 globular, smooth. — Perennials : flowers white. (Name a diminuiive from 

 Tiapa, a tiara, or turban, from the form of the pod, or rather pistil, which is like 

 that of Mitella, to which the name of Mitre-wort projierly belongs.) 



1. T. COrdifblia, L. Leaves from the rootstock or summer runners heart- 

 shaped, sharply lobc-d and toothed, sparsely hairy above, downy beneath; scape 

 leafless (5'- 12' high); raceme simple; petals oblong. — Rich rocky woods: 

 common northward, and southward along the mountains. April, May. 



13. CHRYSOSPLENIUM, Touni. Golden Saxifr.vge. 



Calyx-tube coherent with the ovary; the blunt lobes 4-5, yellow within. 

 Petals none. Stamens 8-10, very short, inserted on a conspicuous disk. 



