98 Ign. Urban, 



Repert. V. 777: W. J. Hook, in Bot. Mag. ad t. 4491, {non Microspermum 

 Lag. Elench. PL Hort. Jlatr. Gen. et Spcc. 25.) — Mentzelia sect. Micro- 

 sperma Endl. Gen. Plant, p. 931 ii. 5111. — Alentzelia sect. Granimato- 

 spernia Fisch, et Mey. Ind. Sem. Hort. Petrop. X. (1845) p. 54, itermn inipr. 

 in Ann. Scicnc. nat. 3 8ev. V. (1846) p. 378. — Jlentze/ia sect. Eticnide 

 Benth. et Hook. Gen. Plant. I. 804. — Mentzelia pro parte Baill. Hist. Plant. 

 VIII. 465. 



Floreö 5-meri. Calycis tubus semiglobosus iisqiie turbinatus; lobi 

 in aestivatioue plus minus imbricati, raro aperti, usque ad ovarium liberi v. 

 basi connati, post anthesin ad liasin conniventes et disco subappressi, postremo 

 emarcidi persistentes. Petala in aestivatioue valde imbricata, plerumque 

 quincuucialia, basi connata, sul)rliombeo-obovata usque obovato-oblonga, 

 plana, sepalis longiora. Stamina numerosa 2 — 5-seriata, basi inter sese 

 connata et exteriora petalis annulatim adnata, postremo cum petalis supra 

 stylum delabentia; filamenta lineari-filiformia; antherae juniores ovatae usque 

 quadrato-orbiculares, sublateraliter dehiscentes, in ^h — Vö alt. inter loculos 

 affixae; pollinis granula viva elliptica 3-riraosa. Staminodia nulla. Stylus 

 filiformis a basi v. ad apicem 5-gonus, anguli!^ dorso superne lineari-stig- 

 matosis. Ovarium vertice sujjra discum subplanum glabrum annularem 

 eonvexum v. l)reviter semigdoboso-productura et lioc loco 5-sulcatum, caeterum 

 inferum 1-loculare; placentae 5 (raro 4) sepalis alternae prominentes trans- 

 versim semiorbiculares, lamella brevissima cum carpidiis conjunctae; ovula 

 uumerosissima placentis multiseriatim affixa, borizontalia, longitrorsum striata, 

 micropyle in ovulis intermediis supera, in caeteris omnibus laterali eademque 

 ad anguluni inter carpidium et placentam spectante. Capsula obovata v. 

 obovato-turbinata, supra lobos calycinos debiscens, funiculis brevissimis 

 crassiusculis depresse gibberiformibus plerumque concaviusculis densissime 

 aggregatis. Semina uumerosissima minuta breviter cylindracea v. ovali- 

 oblouga, utrinque v. apice tantum apiculata, umbone basali retracto v. evanes- 

 cente, testa elevatim costata; endospermium conspicuum. Embryo rectus 

 teres; radicula obtusa quam cotyledones ovales v. oblongae vix v. pauUo 

 angustior et longior. 



Herbae anniiae v. biennes, setis v. setulis nunc uretitibus, nunc secer- 

 nentibus nunc deficientibus niunitae et pilis verticillatini glochidiatis densissime 



