34 Ign. Urban, 



10 mm long, decrescentia, filiformia glabra; antherae juniores oblongae v. oblongo-lineares, 

 2,5 — 0,8 mm longae, 0,4 — 0,6 mm latae, apice vix v. non emarginatae, dorso snpra basin vis 

 in i/io alt. affixae, jam ante efflorescentiam subcontortae, defloratae solemniter dextrorsum 

 contortae; pollinis granula elliptica laevia longitrorsum 3-nmosa, 36 — 39 [i longa, 15 — 16 fi 

 crassa. Discns glaber, ad maiginem versus paullum annulari-convexns. Stj^lus antheras 

 snperans, postremo 18 — 28 mm longus, filiformis aequicrassus angulatus, e lamellis 3 conflatus, 

 margine lamellarum superiore er. 5 mm longe et manifeste papillosus, in fructu persistens. 

 Placentae 3, ordine f dispositae, crassiuscule filiformes; ovula placentis prima juventnte 2-se- 

 riatim affixa, anatropa, micropyle ad angulum placentae spectante, indumento unico, posterius 

 in placentis vicinis superposita ideoque in tote 3-seriata, funiculis mülis, angulata manifeste 

 punctata. Fructus erectus, subcurvatus, cuneato - cylindraceus , inferne sensim attenuatus, 

 15 — 25 mm longus, superne 3,5 — 4 mm crassus, nigrescens, pube calycis tubi, longitrorsum 

 obsolete 10-striatus, postremo transversim saepe subtriangularis, calyce persistente et style 

 coronatus, apice 3-valvis; placentae in vivo crasse filiformes, irregulariter angulato-crenatae, 

 in sicco emarcidae angustae, linea longitudinali elevata praeditae, intervallis glabris nitidis. 

 Semina dense aggregata et sibi accumbentia, sub- 3-seriata, ambitu varia , pleraque sub- 

 ovata, irregulariter angulata, areis subimpressis, non alata, brunnescentia, minutissime granulato- 

 punctata, 1,5 — 2 mm longa, 1 — 1,3 mm lata; endosperminm mediocre. Embryo plus minus cur- 

 vatus; cotyledones convexae orbiculares, radiculae extrorsum subrectae, intus convexae sub- 

 aeqiülongae subtereti plus minus oblique affixae. 



Habitat in California: Douglas, Bridges n. 91, prope Corrae Hollow: Brewer 

 (ex Bot. Calif.); Oregon, prope Klamath Lake: Summers. 



Floret m. Jul. — In hortos Europaeos jam multos ante annos introducta. — V. s. 

 spontaneam in herb. Berol., Boissier-Barbey, Candolle, Kew., J. D. Smith, Vindobon. 



6. Mentzelia congesta Torr, et Gray caule flaveseente vel flavido-albescente 

 usque albido, subglabro vel praecipue inferne glabro; floribus glomerato-eymosis; fila- 

 mentis 15—30, 1 — 2-8eriatis; antheris numquam eoutortis; Capsula 3 — 4-plo lougiore 

 quam crassiore, basi bracteis ovato-orbicularibus membranaceis pallescentibus iuvolu- 

 crata ac paene abscondita. 



Mentzelia congesta Torr, et Gray Fl. North. Am. (1838 — 40). I. 534; Walj). 

 Rep. II. 224; Breiv. et Wats. Bot. Calif. I. 236; Wats. Bihl. Lid. I. 389; Greene Fl. 

 Francisc. II. 282. 



Trachypliytum congestum Nutt. Msc. ex Torr, et Gray Fl. North. Am. (1838 — 40) 

 I. 534. 



Annua. Radix fusiformis. Caulis erectus 20 — 35 cm altus, supra basin 3 — 6 mm 

 crassus, teres plus minus manifeste striatus, pallide flavescens v. albescens, pilis brevibus in- 

 aequilongis patentibus albidis verticillatim glochidiatis dense obtectus, pilis nonnuUis longioribns 

 apice non glochidiatis antrorsum spinuligeris intermixtis, a basi ramosus, ramis erectis, apice 

 congesto-floriferis, gemmis serialibus nullis. Folia alterna sessilia, infima (saepe decidua) 

 conferta, caetera laxa, inferiora linearia v. lanceolato-linearia, 5 — 7 cm longa, 4 — 7 mm lata, 

 10 — 12-plo longiora quam latiora, integra v. in parte antica pinnatifida, lobis inter sese remotis 

 obtusis ad basin petioliformi - angustatis, intermedia sensim breviora, e basi latiore subcordata 

 semiamplexicauli sensim angustata, lanceolata v. lanceolato-acuminata, inferne v. ad basin 

 tantum dentata v. inciso-dentata, omnia subtus pilis glochidiatis creberrimis, supra et ad mar- 



