Bupofyjoncni.] CXXXIV. POLYGONACE^. 07 



14. Polygronella, Mich. Fl. Bor. Ainier. ii. 240. (Gonopyruni, 0. A. Mey. m Mem. 



Acad. Pdersb. ser. 6, vi. 144, Lyonia et Stopinaca, Rajin. ex E^idl.) — Flores polygami 

 henuaphroditi v. abortu unisexuales. Perianthium 5-partituiiij segnientis 2 exterioribus 

 minoribus patentibus v. demiim reflexis, 3 interioribui? erectis post antliesin accrctis uuci 

 appressis. Staiiiiua 8, filamentis filifoniiibus v. basi leviter dilatatis v. interioribus basi 

 latis 2-auriculatis ; autherte parvstj. Ovarium 3-gonum ; styli 3, apice capitato-stigmarobi. 

 Nux 3-gona, nitida, periautliii segmentis interioribus obiecta, pericarpio crustac<jo. 

 Embryo excentricus v. lateralis^ rectus v. leviter iucurvus, interdum flexuosus, cotyle- 

 donibus angustis. — Herbce auuuie, erectse, tenues, rigidulje (v. basi fn. tescentes 0- 

 Folia alterna, lineari-subulata v. cuneata ; ocreai truncatai v. obliquse, nt i- scariosa;, 

 Flores racemosi, parvi, colorati, secus rhachin intra bracteas parvas vaginantes si^pe imbri- 

 catas solitariij pedicellatij racemis teniiibus paiiicTilatis. 



Species 5 v. 6, boreali-American^. Meissn. in DC. Prod. xiv. 79 {excl. P. articnla(a). 



15. Polyg^onum, Xinn, Gen. n. 495. — Flores hermaphroditi v. rarius abortu polygami. 

 Perianthium alte 5-lobum v. 5-partitum, s^epius coloratum, segmentis sub.^qualibus 

 V. 3 exterioribus paullo majoribus, fructiferum nucem velans parum mutatum v. rarius 

 succiilentum v. 3-alatum, Stamina in fiore 5-mero saipius 8, in 4-mero 6, v. in utroque 

 hinc inde pauciora, prope basin perianthii affixa ; filamenta iiliformia, ima basi srepe 

 dilatata v. circa discum annularem crenulatum basi perianthii adnatum crenis alterna ; 

 anther?e oblongpo ovatro v. parva^j loculis distinctis connectivo parvo junctis. Ovarium 

 compressum v. 3-gonum; styli 2 v. 3, a basi distincti v. plus minus connati^ stigmatibus 

 temxinalibus capitatis integris v. (in sect. Pleuroptero) latis subfimbriatis ; ovulum sjepe 

 stipitatum. Nux compressa v. 3-gona, angulis obtusis v. acutis, perianthio onuiino 

 obtecta v. apice brevissimo exsorta, pericarpio crustaceo nitido v. opaco v. rarius submem- 

 branaceo. Embryo excentricus v. lateralis, plus minus incumbenti- accumbenti- v. oblique 

 curvulus, cotyledonibus angustis v. rarius oblongis radicula brevioribus v. longioribus. — 

 Herb?e rarius basi frutesccntes habitu vario, nunc huniiles tencrrim?e v. prostraUe, nunc 

 erectai elat^e, interdum longe volubiles, rarissime fluitantes. Folia alterna, stipulis 

 ssepissime membranaceo-scariosis, in ocream truncatam v. obliquam v. iitriuque acu- 

 minatam integram laceram v. ciliatam connatis. Flores fasciculati v. rarius subsolitarii, 

 fasciculis axillaribus v, intra bracteas laxas v. ocreas in spicas racomosve simplices v. i:)ani- 

 culatos dispositis. Pedicelli infra v. supra medium articulati. 



Species bene distineta? vix 150, duplici fere numoro a botanicis nonnullis rcccnsitae, per orbem 

 fere totum terrarum late dispcrsio, ncc in frigldis alpinisve nee intra tropicus desimt, in Iiemispha^rio 

 boreali qiiam in australi nunierosiores, nuiuuilIiTe tiimen fere cosmopolitaiiae. Meiiif>n. hi DC. Prod. 

 xiv. 84, et in Ann. Mas. Liujd. Bat. ii. 56. Hance In Ann. Sc. Nat. scr. 5, v. 237, Boiss. Fl. Or. 

 iv. 1025. 



Genus polymorphum, species ineludit plures valde variabiles et extricatn difficiles, ab aiictoribus 

 interdum in genera plnra, a 3Ieissnero aliisque in seetiones divisum quarum sequontes nobis bene 

 distinctae videntur : — 



1. Tephis. Fniticuliis ramosissimiis, dense foliatns, foliis parvis in petiole brevi ai-ticulatfs et 

 inflorescentia Aviailari(e. Perianthium 4-fidum, Stamina vuTgo 6, filamentis basi dilatatis. Nux 

 compressa, stylis 2. Embryo incumbenti-incurvus. Species 1, Austro-Africaua. Tephis, Adans. 

 Fant. ii. 276. 



2. Avicukt7-ia. Herbse annuie v. basi frutescentes, diffusse prostratae v. caulibus elongatis 

 virgatis. Folia in petiole brevi articulata, sa'pius parvula; oerese scariosse, ssepiuiy utrinquu in 

 Btipulas aeuminafas v. laceras produotse. Florum fasciculi axillaros v. superiores irrcgnlariter ct 

 dissite spicati. Periantliium vnlgo 5-pnrtitum, staniinibus 6 v. hinc inde paucioribus, filamcntis 

 3 interioribus v. omnibus basi dibitatis. Nux 3-gona, stylis 3. Embryo lateralis, incumbcnti- 

 curvulus. — Species ad 50, per totam fere aream generis dispcrsa', nouuulhe in cultis ruderatisve 

 V. in areno!>is maritimis cosmopolitauue. All FL Pcdcm. t. 90, /. 2. Ten. Fl. Nap. t. 35. Waldst, 

 ct Kit. PI. Bung, f, 67. Slhih. Fl, Gr<ec\ L 363, 364. Ledeb. Ic. Fl. lioss. t. 444. Jauh. et Simch, 

 III. PI. Or. t. 116 ad 126. ^Vii/hi, Ic. t. 1808. 



Duravia, a S, Wats, in Amer. Natural, vii. 665 prosectione distinctaproposita, est P. caUfornicum 



VOL. III. H 



