238 SAXIFRAGES. [Tiarella. 



i 



2. TIARELLA Linn. 



Calyx 5-partitus persistens imo ovario basi adhserens, lobis obtusis. Petala 5 calyci 

 inserta unguiculata Integra lobis calycis alterna. Stamina 10. Styli 2 liberi. Ovarium 

 2-lociilare. Capsula I-locularis, imo calyci adnata membranacea 2-val\'is, valvis intequali- 

 bus (carpello uno interdum abortive) inter stylos dehiscentibus. Semina in fundo capsulse 

 secus niargines carpellorum adfixa. — Herbse pereiines Mitellte^cze. Caules erecti 7iudi aut 

 oligophylli. Folia pleraque radicalia petiolata, Racemi tcrminaleSy simplices^ Jloribus 

 distantibus pedicellatisy fructigeris pedicello post anthesin incurvo pendidis. DC. 



* Foliis simplicihus* 



1 • T. cordifoUa ; caule apbyllo, stolonibus reptantibus, foliis cordatis acutis inciso-lobatis 

 seiTatis dentibus mucronatis, racemo simplici. Linn, Sp. PL p, 580. Mich. Am. v. 1. p. 

 271. Pursh, PL Am, v. \.p. 313. Torrey, PL of Un. St v. 1. p. 444. BigeL PL Post. ed. 

 2. p. 178. Bat. Mag. t. 1589. 



Hab. Canada. Pursk. About Montreal, Mrs. Percival. Lake Huron. Dr. Todd. 



2. T. nnifoliata; glubriuscula, caule unifoliato, foliis omnibus petiolatis triangulari-cordatis 

 obtuse dentatis dentibus brevi-niucronatis, panicula laxa, floribus nutantibus, calycibus 

 campanulatis, petalis abortivis, (?) (Tab. LXXXI.) 



Caulis pedalis, g-laber yel supeme solumiuodo pubescens, erectus, gracilis supra medium unifoliolatus. 

 Folia omnia sub longe petiolata triaugTiIari-cordata, membranacea, 3-5-!obata, acuta, lobis acutis dentatis, 

 dentil)us obtusis brevi-mucronatis, supeme sparse pilosa. Panicula oblonga laxa, pedunculis dichotomis 

 pedicellisque sub ebracteatis. Flares mediocres saepe deflexi. Calyx campanulatus, pubescens, profunde 

 5-fidus, segraentis obtusis. Stamina fertilia 10, (anplura?) exsertaj ahortiva (an petala?) 5. Capsula 

 obiongu, stylis nunc persisteutibus, nunc acutis. Semina obovato-oblonga, laevia, fusco-castanea, nitida. 



Hab. Height of land in the Rocky Mountains, near the soui*ce of the Columbia, and at Portage River. 

 Drummond. — This new species of Tiarella has much of the habit of Heuchera glabra ; but the flowers are 

 smaller, the stem has constantly only one leaf, and that nearly as large as those of the root, and the fruit is 

 truly that of a Tiarella. I find coustautly ten perfect stamens, and about as many apparently abortive ones, 

 which may be abortive petals. Perfect petals, if any exist, must be very fugacious, as I have never been 

 able to detect them. 



Tab- LXXXI. Fig. 1, Flower ; Jig, 2, Capsule ; Jig. 3, Seeds : — magnijied. 



3. T.? Menziesii; foliis ovatis cordatis acutis dentatis, caulinis alternis distantibus, racemo 

 filiformi subspicato, calycibus tubulosis. Pursh^ PL Am, v. 1. p. 313. De Cand, Prodr. v. 

 4. /». 50. — An Heuchera Menziesii nobis? 



Hab. " North-West Coast. A. Menzies, Psq." — This, I suspect to be the Heuchera Menziesii of the 

 present work j but the character of the inflorescence is at variance with that plant, which leaves me in 

 doubt on the subject. 



# # 



Poliis compositis. 



4. T. trifoUata; caule 1-2-foliato (rarius nudo), foliis omnibus trifoliolatis, foliolis 

 rhombeo-ovatis inciso-dentatis dentibus mucronatis, panicula laxa, floribus nutantibus, 

 calycibus (parvis) lato-campanulatis, petalis obovato-lanceolatis. Linn, Amcen, Acad, v, 2. 

 p. 351. Pursh, PL Am. v. I, p. SIB, 



