J48 K« Krause. — Araceae-jCalloideae. 



Tribus I. Symplocarpeae. 



23. Lysichitum Schott. 



Lysichitum*) (Lysichiton) Schott in Österr. Bot. Wochenbl. (1867) 62, Gen. Aroid. 

 (1858) t. 91, Prodr. (<860) 420; Engl, in Nova Acta XXXIX. (1877) 173, in DG. 

 Monogr. Phan. II. (1879) 209 et in Engl.-Prantl, Pflzfam. II. 3. (1889) 122; Benth. et 

 Hook. f. Gen. III. (1880) 94; Baill. Hist. pl. XIII. (1894) 508. — Dracontium L. Spec. 

 pl. ed. 1. (1753) 968; Willd. Sp. II. (1799) 289. — Pothos Spreng. Syst. III. (1826) 

 767. — Symplocarpus Bongard in Mem. Ac. St. Petersb. 6. ser. II. (1833) 168; Schott, 

 Melet. I. (1832) 22 pr. p., Kunth, Enum. III. (1844) 84 pr. p.; Ledeb. Fl. Boss. IV. (1853) 

 12. — Ardiodracon A. Gray in Mem. Am. Acad. 2. ser. VI. (1858 — 1859) 40 8. 



Flores hermaphroditi perigoniati. Perigonii tepala 4 sublineari-oblonga, fornicata, 

 fornice arrecto, in praefloratione vix regulariter imbricata, paullum inaequaha. Staminura 

 4 filamenta paullum dilatata complanata apice subrepentino in connectivum tenue acu- 

 minatum angustata, pistillis breviora, antherae breves thecis suboppositis ellipticis, haud 

 apiculatis, connectivum superantibus, rima longitudinali fere usque ad basin dehiscen- 

 tibus, extrorsum versis. Ovarium elongato-ovoideum apice attenuatum, rhachi immer- 

 sum, stigmate sessili capitellato coronatum, 2-loculare vel incomplete 2-loculare, septi 

 hemiphragmatibus medio subdiscedentibas, loculis 1 — 2-ovulatis; ovula oblonga funiculo 

 brevi in placentae crassulae e medio axeos exsertae, densissime papillosae fovea ap- 

 pensa, micropyle fundum spectans. Baccae rhachi insertae, 2-loculares, loculis mono- 

 spermis. Semen ellipticum vel ovoideum, septum versus paullum applanatum, dorso 

 convexum, exalbuminosum. Embryo macropodus. — Herba magna paludosa rhizomate 

 crasso repente hypogaeo perennis, post folia plura cataphylla pauca atque pedunculum 

 proferens. Foliorum petiolus crassus supra leviter excavatus vel minime applanatus, 

 lamina interdum maxima elliptica vel ovato-elliptica rarius ovato-oblonga vel oblongo- 

 lanceolata apice subacuta vel obtusiuscula, costa media crassa instructa. Pedunculus longus 

 crassus cataphyllis paucis involutus. Spatha soluta membranacea in laminam ovatam 

 cucullatam extensa, spadicem juvenculum involvens, serius pedunculum inferne involvens 

 superne discedens. Spadix cylindraceus apice rotundatus densiflorus, sursum florens. 



Species unica: 



L. camtschatcense (L.) Schott in Österr. Bot. Wochenbl. III. (1857) 62, Prodr, 

 (1860) 421; Miq. Ann. Mus. Lugd.-Bat. I. (1863) 285, II. (1865) 202; Engl, in DC. 

 Monogr. Phan. II. (1879) 210; Macoun, Cat. Canad. PI. IV. (1888) 73; Franch. et 

 Savat. Enum. pl. Jap. II. (1879) 9; Honzo Zufu XXIV. (1828) t. 18; Somoku Zusetsu 

 XIX. (1856) t. 10; Hov^rell, Fl. N. W. Am. I. (1903) 667; Hemsl. in Bot. Magaz. 

 t. 7937. — L, camtschaticum Schott, Gen. Aroid. (1858) t. 91. — L. kamtschat- 

 censis Watson, Bot. Galif. II. (1880) 187, 484. — L. japonicum Schott ex Miq. Cat. 

 Mus Bot. Lugd.-Bat. (1870) 96; Franch. et Sav. Enum. PI. Jap. II. (1879) 9. — 

 Dracontium camtschatcense L. Spec. pl. ed. 1. (1753) 968; Willd. Sp. II. (1799) 

 289. — Dracontium foliis lanceolatis L. Amoen. Acad. II. (1751) 362. — Pothos 

 camtschaticus Spreng. Syst. III. (1826) 767. — Symplocarpus kamtschaticus Bong, in 

 Mem. Acad. Petersb. 6. ser. II. (1833) 169: Schott, Melet. I. (1832) 22; Ledeb. FL 

 Boss. IV. (1853) 12. — Symplocarpus camtschaticus Kunth, Enum. pl. IIL (184 4) 

 84. — Ardiodracon japonicum A. Gray in Mem. Amer. Acad. 2. ser. VI. (1858 — 59) 

 408. — Ardiodracon camtschaticum A. Gray I. c. 409. — Foliorum petiolus ad 

 1,5 dm vel ultra longus, lamina 0,3 — 1 m longa, superne usque ad 3 dm lata, basin 

 versus sensim angustata, nervis lateralibus I. inferioribus a costa media crassa paten- 

 tibus superioribus adscendentibus, omnibus longe prope marginem procurrentibus, infe- 

 rioribus in margine exeuntibus, superioribus apicem rotundatum apiculatum versus 

 patentibus, nervis secundariis inter primarios oblique transversis atque venis tenuibus 



*) »Nomen ex Xvais^ dissolutio et /itcjp tunica compositum , propter spatham a spadicis 

 edunculo dissolutam« (Schott, 1. c). 



