200 A. Engler. — Araceae-Aroideae. 



speciminis in Herb. Pal. Beauv., nunc Delessert asservatij. — Arisaema polymorphum 

 Meehan in Bot. Gaz. IX. (1884). — De ramificatione subterranea confer: Ida A, Keller: 

 Notes on Underground runners, in Proceed. of the Acad. Nat. Sc. Philadelphia 1897, 

 p. 161 — 165, pl.IIL — De sexu confer: B. L. Putnam, Determination of sex in Ari- 

 saema triphyllum, Asa Gray Bull. VI. (1898) 50 — 5 2 (Specimina majora feminea, minora 

 mascula sunt). — Nom. vern. Jack in the pulpit (Mac Millan, Minnesota Plant Life 

 [1899] 431, phot. loco natali), Indian turnip. — Tuber subglobosum, rhizomata late- 

 ralia emittens. Cataphylla atque petioli circ. 3 dm longi pallide variegati. Foliorum lamina 

 longius petiolata, segmentis sessilibus ovatis vel oblongo-ovatis 1 — 1,5 dm longis, 5 — 

 8 cm latis, haud longe acuminatis. Spathae extus virentis striato-vittatae intus fundo 

 vittis pallide virentibus interstitiisque atrorubentibus vel totius viridescentis 8 — 17 cm 

 longae tubus ejus dimidium aequans, lamina circ. 3 — 4 cm lata in fauce aperta vix repli- 

 cata acuminata, extus et intus inferne pallide virens, intus superne ex toto atrorubens 

 vittis virentibus instructa aut viridescens. Spadicis inflorescentia plerumque unisexualis 

 1 cm tantum longa, appendix stipitata 3 cm aequans, faucem paullum excedens; flores 

 masculi 2 — 3-andri; flores feminei: pistilla 5 — 6-ovulata. Baccae majusculae circ. 

 1 cm diametientes. 



Var. a. typioum Engl. — Spathae tubus extus virens striato-vittatus intus fundo 

 vittis pallide virentibus interstitiisque atrorubentibus pictus, lamina intus superne ex 

 toto atrorubens vittis virentibus instructa. 



f. Stewardsonii (Britton) Engl. — Arisaema Stewardsonii Britton, Man. Fl. 

 N. U. S. (1901) 1045. — Minor. Foliorum segmenta 7 — 8 cm longa, 3 — 4 cm lata. 

 Spatha vix 7 mm longa. 



Atlantisches Nordamerika: in humusreichen und sumpfigen Laubwäldern von 

 Neu-Schottland bis Florida. — a. Seenprovinz. — '■ 1. Zone der Pinus strobus: Von 

 Neu-Schottland und Neu-Braunschweig über Quebec und Ontario bis Minnesota, besonders 

 verbreitet in allen humusreichen Wäldern von Ontario (J. Macoun — Herb. Berlin); 

 in Milwaukee (Lapham, Henning); Michigan: Keweenaw Point (Herb. Kew). — 

 2. Übergangszone: Vermont: Manchester (A. Day, PL of South. Verm. n. 184); 

 Connecticut: New Haven (Allen); Bhode Island: Providence (Thurber — Herb. Berlin); 

 Massachusetts: Cambridge (Foorbil); New York: Niagara (v. Chrismar — Herb. Berlin), 

 Schenectadia (J. Pearson — Herb. Berlin), Schlangenwald auf Long-Island (Heuser — 

 Herb. Berlin), am Wading-Biver (S. Miller — Herb. De Candolle); Pennsylvania: Lan- 

 caster City, Conestoga und Mt. Hope (A. Heller), Jannersville (Canby — Herb. Berlin — 

 f. Stewardsonii), Beading (Bischoff — Herb. Berlin), Ober-Susquehana (Barbour — 

 Herb. Berlin). — b. Provinz des sommergrünen Missisippi und Alleghani- 

 Waldes. — S. Illinois: Makanda (C. F. Baker — Herjb. Berlin); Indiana: Bluffton 

 (Deam — Herb. Berlin); Ohio: Hamilton (B. Matthes n. 39), Cincinnati (Lloyd), 

 St. Marys (Wetzstein — Herb. Berlin), Cleveland (W. Krebs); New Jersey (Herb. 

 Berlin); Washington (Schutz — Herb. Berlin); Maryland: Baltimore (Bügel — Herb. 

 Boissier); Virginia: Winchester (Herb. Berlin) ; Nord-Carolina: Biltmore (Biltmore Her- 

 barium n. 1288 b), steigt in den Alleghanies bis 1600 m hinauf — blühend April bis 

 Juni; Süd-Carolina (Fräser); Kansas (nach Britton). — c. Immergrüne Provinz 

 der südatlantischen Staaten. — Alabama: zerstreut in Winston County (500 m), 

 Clay, Cullman, Tuscaloosa, Clarke, Mobile, Baldwin Counties (Mohr). 



Var. ß. viride Engl, in DC. Mon. Phan. IL (1879) 425. — Spathae lamina fauce 

 excepta viridescens. 



Massachusetts (Tuckermann); Illinois (Engelmann — Herb. Berlin); Virginia: 

 Winchester (Herb. Berlin). 



Var. y. pusillum (Nash) Engl. — A. pusittum Nash in Britton, Man. Fl. N. U. S. 

 (1901) 229; Small, FL S. E. U. S. (1903) 226. — Foliorum petioli 0,5 — 1,8 dm 

 longi, segmenta ovato-oblonga vel ovato-elliptica, acuminata, 5 — 12 cm longa. Spathae 

 tubus extus pallidus, intus rubro-brunnescens, lamina 5 — 6 cm longa, acuminata, extus 

 virescens, intus atrorubens. Baccae 4 — 5 mm diametientes. 



