Monographia Loasacearum. 89 



intervallis nitentibns glabris fere duplo latiores, postremo emaicidae, sed lamellis horizontaliter 

 positis 2-seriatis, in eadem placenta alternantibus, membranaceis, media in placenta longi- 

 trorsnm undnlato-conjunctis et hoc loco paullo magis elevatis crenatisque inter semina singula 

 binave instructae. Semina in placentis biseriata, in parte posteriore vix superposita, horizon- 

 talia, veris. margini placentae exteriori (v. lamellarum) affixa, funiculis nullis, breviter obovata 

 V. obovato-rotundata, 3 — 3,5 mm longa, 2,5 — 2,8 mm lata, medio 0,6—0,7 mm crassa, plano- 

 convexa, griseo-brunnescentia, minntissime granulato-punctulafa, alata, ala semine ipso dimidio 

 et ultra angustiore membranacea, ad radiculam versus (in placenta extrinsecus) in lamellulas 

 2 divergentes soluta; endospermium mediocre. Embryo rectus; cotyledones planiusculae 

 ovali-orbiculares, subito in radiculam paullo breviorem convexam acatiusculam contractae. 



Habitat in civitatibus Americae sept. uiiitis a California, Oregon et Was- 

 hington usque ad Utah et Wyoming- in vallibus collibusque. Vidimus e California: 

 Bridges n. 90, Bolander n. 6256, Shelton, Douglas, Palmer n. 152, Parry, Nevada Co.: 

 Jones p. p., Santa Lucia Mts.: Vasey, Cueumonga Mts.: Parish n. 159, locis arenosis ad 

 Russian River, Ukiah: Pringle; ex Oregon in „the Dalles": Howell, „Gravel bars": Howell, 

 Multnomah Co.: Howell n. 150, ad cataractas Spokan River: Geyer n. 450 (?) et 451; e 

 Washington: Brandegee u. 522, „Grab Creek Co.": Siiksdorf n. 313; ex Utah: „City 

 Creek Cafion": Summers, Jones n. 1462 p. p., alt. 5300 ped.; e Wyoming: Forn- 

 Avood n. 204. 



Floret m. Jul. — Sept., fruct. Octob. — V. s. in herb. BeroL, Boissier-Barbey, Brnxelles, 

 Candolle, Delessert, Kew, Lips., Martii, Paris, horti Petropol., J. D. Smith, Vindobon. 



Obs. I. ToiT. et Gray 1. c. „petals 5 or rarely 10" indicant; ipsi semper 5 tan- 

 tum invenimns. 



Obs. IL Gray in Plant. Wright. I. 73 de efflorescentia dicit: M. laevicanlis, raised in 

 the Cambridge Botanic Garden, from Oregon seeds brought by Fremont, has bright, pure 

 yellow blossoms, opening in the afternoon at four or five o'clock, in bright sunshine". 



44. Meiitzelia decapetala l'rb. et Gilg, floribus apiee eaulis ramorumque soli- 

 tariis sessilibus; squamis petaloideis 5, petalis simillimis; staminibus er. 200, omnibus 

 filiformibus, subaequilongis, 4^o-seriatis; stylo e lamellis 4 — 7 conflato; Capsula 4 — 7- 

 valvi; placentis 4—7; seminibus anguste alatis, ala semine ipso 5-plo angustiore. 

 Tabula II. Fig. 31—33. Fig. 31. Frnctus. 32. Semen. 33. Embryo. 



Mentzelia decapetala Urb. et Gilg ap. Urh. in Her. Deutsch. Bot. Ges. X. (1892) 

 p. 263 {nomen) et in Eugl.-Prantl Nat. Pfl.-fam. III. 6^ (1894) p. 111. fig. 39. 



Bartonia decaj^etala Pursh in Sims Bot. Mag. (1812) v. 36. t. 1487. 



Bartonia ornata Pursh Flor. Am. sept. I. (1814) p. 327; Poir. in Lam. Encycl. 

 Suppl. V. 572; Ktitt. Gen. I. 297; Barton Flor. North Amer. III. 29. t. 81; ßC.Prodr. 

 III. 339; Nees PI. Nemvied 9. 



Bartonia siqjerha Barf^) in Bart. Fl. North Am. III. (1823) t. 81. 



Mentzelia ornata Torr, and Gray Flor. North Amer. I. (18:^8—40) 534; Gray 

 Plant. Fendl. 47. 



Torreya ornata Eaton Manual 7 ed. ex Wats. Bihl. Ind. I. 391. 



Touterea ornata Fat. et Wr. 452 ex Wats. l. c. 



') Sub autoritate cl. Nuttallii; sed iu Bartouii operibus hoc uomen nou inveninnis. 



Aova Acta LXXVr. Kr. 1. j.l 



