SYNOPSIS OF THE FLORA OF COLORADO. ^ 47 



L.OASACEJE. 



MENTZELIA FUDA, T. & G. Eough with a minute, barbed pubes- 

 cence; stems l-3 high, white, often widely branching; leaves lan- 

 ceolate or oblong-lanceolate, sessile, toothed or piunatitid, with sharp or 

 obtuse spreading teeth, very rough ; flowers large, terminating the 

 branches, vespertine, bracteolate, (not bracteolate, T. & G.); petals 10, 

 lanceolate, tapering at the base, acute, yellowish-white with numerous 

 darker veins, I 7 to 1J 7 long; stamens very numerous, the exterior fila- 

 ments petaloid and often sterile, the others filiform, capsule-cylindrical, 

 I 7 or more long, 4" wide, 3-valved at the summit ; seeds numerous, ovoid, 

 with a broad, membranous wing. Hall & Harbour, 569; Dr. Smith ; 

 B. H. Smith. On the plains near Denver and Colorado Springs, Porter. 

 Canon City, Brandegee. Plains of the Platte, Coulter. 



MENTZELIA ALBICAULIS, Dougl. Stem 6 7 -18 7 high, usually branch- 

 ing from the base, white and polished and nearly glabrous below, rather 

 weak ; leaves lanceolate, remote, more or less deeply pinuatifid, some- 

 times repaud or nearly entire, scabrous, sessile; flowers solitary or some- 

 what clustered, not bracteolate ; petals obovate, 2" long, light-yellow, 

 scarcely exceeding the short, subulate-lanceolate calyx-segments; fila- 

 ments io-30, subulate-filiform or occasionally somewhat dilated; capsules 

 cvlindric, narrow, elongated, attenuate at base, 6 77 to 9 7/ long, 1 7/ to 1 77 

 wide, minutely hispid ; seeds 20-40. Hall & Harbour, 571. ^ear 

 Denver, Canby. Canon City, Brandegee. Plains of the Platte, Coulter. 

 Frequent on the plains and among the foot-hills. 



MENTZELIA MULTLFLORA, ]^utt. PL Gamb. in Jour. Proc. Acad. 

 Phil Feb. 1848, under Bartonia. Steins scabrous, pubescent, f-l 

 high, slender, corymbosely branched above, rough, pubescent or becom- 

 ing smooth and white with age; leaves lanceolate or narrowly lanceo- 

 late, sinuate-pinnatifid, attenuate below and sessile; flowers subtended 

 by 1 or 2 ovate or linear, entire bracts ; petals 10, deep or goldeii-yel- 

 low, oblong-oval, obtuse or acute, 6 /7 -9 /7 long, abruptly pointed, 

 much longer than the subulate calyx-segments; capsules cylindrical-ob- 

 long, about G /7 -8 /7 long, 3 /7 -4 77 wide, a little longer than the calyx- 

 segments ; seeds in a double series, winged. Hall & Harbour, 570; 

 Canby. AVet Mountain Valley, Brandegee. 



MEXTZELIA OLTGOSPE R:\IA, Xutt. Wet Mountain Valley, Brandegee. 



MENTZELIA WKIG-HTII, Gr. PI. Fendl.,p. 48. Annual, rough-scabrous ; 

 stems simple or paniculate, 2 high ; leaves oblong-lanceolate, coarsely 

 sinuate-deutate, lowest attenuate into a petiole, upper ones truncate at 

 base or somewhat broadly auriculate, closely sessile ; bracteoles 1-2, 

 linear, entire, equaling the ovary; flowers small, ochroleucous; petals 10, 

 lanceolate-spatulate, scarcely surpassing the lobes of the calyx, shorter 

 than the cylindrical ovary ; filaments all linear-subulate, outer ones a 

 little dilated; placentas 3-ruany seeded; seeds winged. Purgatory River, 

 Dr. Bell. 



., var. C^SPITOSA, Eng. Syn. Proc. Am. 

 Ac., v. 3, p. 9. Csespitose ; radial spines 12-15, setaceous, straight, puberu- 

 lent, white, central one often wanting ; fiinbriate sepals and yellow pe- 



I MAMILLARIA, Haw. Sepals aiid petals united beyond the naked ovary into a shoit 

 tube. Berry juicy, oval or club-shaped. Seeds brown or black ; embryo straight, 

 without albumen ; cotyledons very short, globose. Low, globose or oval plants, simple 

 or branched, covered with spine-bearing tubercles; flowers rising from the axils of the 

 tubercles, usually small, about as wide as long, opening in sunshine only. 



