. An illustrated flora of the northern United States, Canada and the British possessions : from Newfoundland to the parallel of the southern boundary of Virginia and from the Atlantic Ocean westward to the 102nd meridian. Botany. 56S LOASACEAE. Vol. 3. Nuttallia decapetala (Pursh) Greene. Prairie-lil3^ Showy Alentzelia. Fig. 2980. Bartonia decapetala Pursh, in Bot. Mag. pi. 1487. 1812. Barlonia ornata Pursh. Fl. Am. Sept. 327. 1814 Mentzelia ornata T. & G. FI. N. A. i: 534. 1840. Mentzelia decapetala Urban & Gilg, in Engl. & Prantl, Nat. Pfl. Fam. 3: Abt. 6a, 111. iScj4. A^. d
. An illustrated flora of the northern United States, Canada and the British possessions : from Newfoundland to the parallel of the southern boundary of Virginia and from the Atlantic Ocean westward to the 102nd meridian. Botany. 56S LOASACEAE. Vol. 3. Nuttallia decapetala (Pursh) Greene. Prairie-lil3^ Showy Alentzelia. Fig. 2980. Bartonia decapetala Pursh, in Bot. Mag. pi. 1487. 1812. Barlonia ornata Pursh. Fl. Am. Sept. 327. 1814 Mentzelia ornata T. & G. FI. N. A. i: 534. 1840. Mentzelia decapetala Urban & Gilg, in Engl. & Prantl, Nat. Pfl. Fam. 3: Abt. 6a, 111. iScj4. A^. decapetala Greene, Leaflets i: 210. 1906. Roughish-pubescent, stout, seldom over 2° high. Leaves oval, lanceolate or oblong, acute or acumi- nate at the apex, sinuate-pinnatifid, 2-6' long, the upper sessile, the lower petioled; flowers mostly soli- tary and terminal, yellowish white, 3-5' broad, open- ing in the evening; petals about twice as long as the lanceolate calyx-lobes ; calyx-tube usually bracted : filaments all filiform, very numerous (200-300) ; cap- sule oblong, ii'-2' long, s"-6" thick; seeds numerous, margined, not winged. Plains. Iowa to North Dakota, Saskatchewan. Mon- tana, Nebraska and Texas. Gunebo-lily. lune-Sept. Nuttallia laevicaulis (Dougl.) Greene [Mentselia hcvicaitlis (Dougl.) T. & G.] reported from Nebraska, and admitted into our first edition, is not definitely known within our area. Family 93. CACTACEAE Lindl. Nat. Syst. Ed. 2, 53. 1836. Cactus Family. Fleshy plants, with flattened terete ridged or tubercled, continuous or jointed stems, leafless, or with small leaves (only the tropical genera, Pcreskia and Percs- kiopsis, with large flat leaves), generally abundantly spiny, the spines developed from cushions of hairs or bristles (areolae). Flowers mostly solitary, sessile, ter- minal or lateral, perfect, regular, showy. Calyx-tube adnate to the ovary, its limb many-lobed or with distinct sepals. Petals numerous, imbricated in several
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