Saxifraga. — Sect. 1. Boraphila. — § 5. Integrifoliae. 65 



52. S. pennsylvanica L. Spec. pl. ed. 1. (1753) 399, ed. 2. (1762) 571, ed. 

 Willd., Spec. pl. II. (1799) 640; Michx. Fl. bor.-amer. I. (1803) 269; Sternb. Rev. 

 (1810) 8, Suppl. II. (1831) 43; Pursh, Fl. Amer. septentr. I. (1814) 314; Don in 

 Trans. Linn. Soc. XIII. (18*1) 384; Bigelow, Fl. Boston, ed. 2. (1824) 177; Hook. 

 Fl. bor. amer. 1.(4 833) 249; Engl. Mon. Gatt. Sax. (1872) 149; Britton and Brown, 

 III. FI. North. Un. Stat. II. (1897) 173 et flg. 1831, Gray, New Man. of Bot. 7. ed. 

 (1908) 446; Rosendahl in Engl. Bot. Jahrb. XXXVII. Beibl. n. 83 (1905) 67. — Evaiezoa 

 pennsylvanica Baf. Fl. Teil. II. (1836) 71. — S. pennsylvanica [a. conglomerata Ser. 

 et t 3. corijmbifera) Ser. in DC. Prodr. IV. (1830) 39. — MicranÜies pennsylvanica 

 (L.) Haw. Enum. Sax. (1821) 45; Small in North Amer. Fl. XXII. 2. (1905) 139. — 

 S. marylandica Hort, ex Ser. in DC. Prodr. IV. (1830) 39; Sternb. Suppl. II. (1831) 

 43. — S. semipubescens Sweet Hort, suburb. (1818) 97. — S. hieracifolia Haw. 

 Saxifrag. Enum. (1821) 45 non L. — Solitaria, rhizomate obliquo crasso brevi, apice 

 rosulatim foliato non ramoso, caule florifero scapiformi terminali, stricto, erecto, 0,3 — 

 1 m longo, basi 3 — 7 mm crasso, nudo, superne vel e mcdio paniculato, plurifloro, 

 tota longitudine pilis tenuissimis glanduliferis basin versus saepe dcnsius pubescentc. 

 Folia basalia plerumque suberecta, plana, crassiuscula , costa distincta, hirsutie valde 

 variabilia, glaberrima usque utrinque ac margine dense breviter pubescentia, lamina ob- 

 longa vel elliptica, integra vel levissime dentata vel serrato-dentata, 0,5 — 3 dm longa, 

 2 — 5 cm lata, late acuta vel obtusiuscula, subsessili vel saepius basi in petiolum bre- 

 vem usque V3 laminae metientem saepe alatum basi semiamplexicaulem glabrum vel pubes- 

 scentem sensim angustata, folia infima breviora et latiora. Inflorescentiae rami primarii 

 ramosi pluriflori, 2 — 10 cm longi, pedunculo I — 6 cm longo instructi, erecto -patentes 

 vel ascendentes, dichasia formantes vel racemosi, plerumque dense glanduloso-pilosi, 

 bracteis linearibus integris vix ultra 1 cm longis plus minusve pilosis instructi; pedi- 

 celli floribus aequilongi vel duplo longiores, prophyllis minutis linearibus suffulti; sepala 

 horizontaliter patentia, ovata vel triangulari-ovata, 1 — 1,8 mm longa, obtusiuscula, gla- 

 bra, uni-vel trinervia, costata, apice clavatim incrassata; petala patentia, oblongo- 

 lanceolata vel ovali-oblonga, saepe infra medium latiora, 1,5 — 3,3 mm longa, saepius 

 subacuta, basi non unguiculata, uni-vel trinervia, plerumque viridula, rarius albida (in 

 Var. Forbesii)', stamina filamentis subulatis vel linearibus instructa, sepalis sub- 

 acquilonga; ovarium subsuperum in anthesi disciforme, annulo mellifero incrassatum, 

 in stilos breves erectos stigmate parvo suffultos subito contractum. Capsulae carpella 

 ovoidea usque ad calycem circ. ad i /\ longitudinis inferum libera, paulum divaricata, 

 2,5 — 4 mm longa, sepalis reflexis et stilis brevißsimis haud ultra 0,5 mm longis sub- 

 reflexis instructa; semina majuscula, oblongo-ovoidea, subacuta, circ. 1 mm longa, mi- 

 nute papulosa, brunnea. 



Nota I. Hujus speciei formae hortenses sunt S. marylandica Ser. in DC. Prodr. IV (1830) 

 39 et 40, S. caroliniana Hort, et S. semipubescens Sweet, Hort, suburban. Lond. (1818) 97 (Don 

 1. c. 385; Sternb. Suppl. II. (1831) 43). S. semipubescentis folia ex cl. Don glaberrima, ex cl. Stern- 

 berg glabra vel subtus pilosa vel utrinque pilosa. Quum etiam in planta typica petala bre- 

 viora occurrant, nulla nota Saxifragae semipubescenti propria restat, qua de causa hoc nomen 

 et duo altera nobis Synonyma sunt. 



Nota 2. S. Forbesii Vasey ab autoribus nonnullis sub titulo speciei enumeratur, exempli 

 gr. in Asa Gray, Manual 7. ed. (1908) 4 46. Attamen baec planta a reliquis formis Saxifragae 

 pcnnsylvaniae non differt nisi foliis brevius petiolatis et petalis magis albescentibus, quibus de 

 causis varictatis tantum titulum ei concedere possumus. 



Var. ct. typica. — Folia basalia sublineari-oblonga glabra vel hirsuta, basi ple- 

 rumque in petiolum l / 4 — ! /s laminae metientem sensim angustata. Petala flavida vel 

 viridula, plerumque uninervia. 



Nota. Plantae inflorescentia pro aetate diversa apparet ramis dz densifloris («. conglo- 

 merata et ß. corymbifera Ser. in DC. Prodr. IV. (1830) 37; Engl. Mon. Gatt Sax. (1872) 153; 

 Torrey and Gray, Fl. North Am. I. (1840) 572). Melius formae diversi vestimenti distinguuntur. 



A. Engler, Da« Pflanzenreich. IV. (Embryophyta liphonog-ama) 117. S&xifrkga. 5 



