46 Günther Beck-Mannagetta. — Orobanchaceae. 



Sect. 1. Gymnocaulis Nuttall. 



OrobancJie sect. Gymnocaulis Nuttall, Gen. North Amer. pl. II. (1818) 59; Asa 

 Gray, Synopt. Fl. of North Amer. II. 1. (1878) 312. — Äphyllon Mitchell in Act. phys. 

 med. acad. nat. cur. VIII. (1748) 221 sec. Benth.; Torrey et A. Gray, Man. bot. Unit. 

 Stat. ed. 1. (1848) 290 et Benth. et Hook. f. Gen. pl. (1876) 983. — Thalesia Raf. 

 in Amer. Monthly magaz. (1818) 267; Britton in Mem. Torr. bot. club V. (1894) 29 # 8; 

 Britt. et Brown, 111. Fl. North U. St. III. (1898) 194, non Marthas (= Leptolobium), nee 

 Bronner (1857). — Loxanthes Raf. Neogenyt. (1825) 3 sec Index Kew. non aliorum. — 

 Orobanehe tribus III. Anoplon Wallr. Orob. gen. diask. (1825) 66 p. p. et sect. Äphyllon 

 (Mitchell) Beck, Mon. Orob. (i 890) 74 et in Engl. u. Prantl, Nat. Pflanzenfam. IV. 3 b. 

 (1895) 129. — Anoplon Reichb. Gonsp. (1828) 212b, n. 3060a; G. Don, Gen. hist. 

 IV. (1837) 633 p. p. — Anoplanthus sect. Euanoplon Endl. Icon. gen. pl. (1838) t. 72 

 et Gen. pl. 727; Walpers, Rep. III, 480; Reut, in DG. Prodr. XI. 41 (pro max. parte). — 

 Äphyllon sect. I. (Äphyllon) A. Gray, Bot. of Calif. I. (1876) 58 4. — Flores longissime 

 pedicellati, erecto-racemosi, bractea unica suffulti. Galyx ebracteolatus, gamosepalus, 

 campanulato-cupuliformis, subregulariter 5-dentatus, dente quinto postico. Gorolla sub- 

 indistinete bilabiata, lobis omnibus subaequalibus, plurimum coeruleo-violacea vel pur- 

 purascens; rarius pallidior. Gellulae endothecii antherarum aporosae, incrassatae. Pollen 

 20 — 27 (l. Placentae in quoque carpello 2, separatae, itaque 4. Stigma infundibuli- 

 forme, subbilobum. Gellulae testae parce porosae. Plantae Americae borealis; species 3. 



— Fig. \0 A—G. 



Dispositio specierum sectionis Gymnocaulis. 



A. Caulis brevissimus, sine racemo vix 4 cm longus. Bracteae 

 pedicellos plus minus amplectentes, subglabrae. Calycis dentes 

 lanceolati-subulati, plurimum tubo longiores. Laciniae corollae 

 pilis brevibus articulatis intense coeruleis marginatae. (Ame- 

 rica borealis) 1.0. uniflora. 



B. Caulis elongatus, sine racemo — 1 5 cm longus. Bracteae 

 non amplectentes, liberae, ereetae. 



a. Flores pauci. Pedicelli erecti, laxi. Calycis dentes tubo 

 duplo longiores. Gorolla intense violaceo-purpurea. (Ame- 

 rica boreali-occidentalis) 2.O. porphyrantha. 



b. Flores fasciculati, 3 — 12. Pedicelli stricti, aggregati. 

 Calycis dentes tubum longitudine aequantes. Corolla pur- 



purascens. (America borealis) 3. O. fasciculata. 



1. 0. uniflora L. Spec. pl. (1753) 633, ed. 2. (1764) 882; Poiret in Lamarck, 

 Enc. meth. IV. 623; Willd. Spec. pl. III. 352; Darlingt. Fl. cestrica (1837) 377; Torrey, 

 Fl. of New York II. (1843) 23; Beck, Mon. Orob. (1890) 75, t. I, f. 1; Gray, New 

 manual of bot. ed. 7. by Robinson and Fernald (1908) 740. — Orobanehe (Gymno- 

 caulis) biflora Nuttall, Gen. North Am. pl. II. (1818) 59; Hook. Fl. bor. amer. II. 93. 



— Phelipaea biflora Sprengel, Syst. II. (1825) 818. — Anoplon biflorum G. Don, Syst. 

 IV. (1 838) 634, n. 4. — Anoplanthus uniflorus Endlicher, Iconogr. gen. pl. (1 838) p. XII, 

 t. 72; Reuter in DG. Prodr. XI. 41. — Äphyllon uniflorum Gray, Man. bot. ed. I. 

 (1848) 290 et Syn. Fl. II. 312; Bot. of Calif. 584; Th. Meehan, The native flowers 

 of the U. St. ser. 2. IL (1880) t. 22, n. v. — Äphyllon uniflorum Torrey et Gray in 

 Gray, Manual bot. ed. 2. (1856) 281; ed. 5. 323; Torrey, Bot. of the Boundary, 110. 



— Thalesia uniflora Britton in Mem. Torr. bot. Club V. (1894) 298; Britton and Brown, 

 Illustr. fl. North. Unit. stat. III. (1898) 195; Small, Fl. of the Southeast. Un. stat. 

 (1903) 1093. — Caulis singulus vel plures aggregati, simplex (vel ex infima basi ramosus), 

 basi vix incrassatus et fibrillis copiose cinetus, brevissimus, sine racemo — 4 cm longus, 

 squamis paucis involutus, ochroleucus, subglaber, 1 — 4-florus. Squamae ovato-oblongae, 

 apice rotundatae vel subacutae, membranaceae, in bracteas transeuntes. Bracteae pedi- 



