170 SAXIFRAGACE^. (SAXIFRAGE PAMILT.) 



* * Flowers larger : calyx (3" - 4" long) more or less obligue : stamens short : panicle 

 veiy narrow : leaves rounded, slightly 5 - 9-lobed, 



3. H. hlspida, Pursh. Hispid or hirsute with long spreading hairs (oc- 

 casionally almost glabrous), scarcely glandular ; stamens soon exserted, longer titan 

 the spatulaie petals. (H. Eichardsonii, R. Br.) — Mountains of Virginia. Also 

 Illinois {Dr. Mead) and northwestward. May- July. — Scapes 2° -4° high. 



4. H. pub^SCenS, Pursh. Scape (l°-3° high) and Tpetioles granular- 

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

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

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



11. MITELLA, Toum. Mitke-wort. Bishop's-Cap. 



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

 pinnatifid. Stamens 10, included. Styles 2, very short. Pod short, 2-beak.ed, 

 1-celIed, with 2 parietal or rather basal several-seeded placenta;, 2-valved at the 

 summit. Seeds smooth and shining. — 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 filrpa, a mitre or cap, alluding to the form 

 of the young pod.) 



1 • M. diph^lla, L. Hairy, leaves heart-shaped, acute, somewhat 3-5- 

 lobed, toothed, tltose on the many-flowei-ed-scape 2, opposite, nearly sessile. — Hill- 

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

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



2. M. ntlda, L. Small and slender ; leaves rounded or kidney-form, deeply 

 and doubly creuate ; scape usually leafless, few-flowered, very slender (4' - 6' 

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

 moss, Maine to Wisconsin and northward. May - July. • — A deUcate little 

 plant, sending forth runners in summer. Blossoms greenish. 



12. TIARELLA, L. False Mitke-wort. 



Calj'x bell-shaped, nearly free from the ovary, 5-parted. 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 diminutive from 

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

 that of MitcUa, to which the name of Mitre-ivort properly belongs.) 



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

 shaped, sharply lobed 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, Toum. Golden Saxifrage. 



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. 



