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3 
- MENTZELIA, LOASACEA., 239 
larly. (2) Seed large, tinged, ovoid or subglobose, smooth, not 
margined; hilum linear, acute: cotyledons thick, remaining 
under ground in germination. Stems elongated and climbing, 
from ‘large fusiform’ perennial roots; leaves cordate, palmately 
5-7-lobed or angled; tendrils 2—5-cleft; flowers small, white. 
M. Oregana Megarrhirz« Oregana Torr. Watson. Stems 10-30 feet 
long; scabrous or nearly smooth; leaves cordate or reniform 3-6 inches 
broad, deeply 5-7 lobed, lobes broad-triangular, abruptly acute, mucron- 
ate, sterile flowers 10-20 in slender racemes 4-’in. long, on slender pedi- 
cels; corolla 3-4 lines broad; fertile flowers without abortive stamens; . 
ovary globose, densely echinate, 2-4-celled, the cells 1-2 ovuled, fruit glo- 
bose to oblong, 1-2 in. in diameter covered with stout fleshy spines, 1-sey- 
eral-seeded, seeds orbicular 6-10 lines in diameter. In atluvial soil, Oregon 
and Washington to Idaho and Montana. 
Orper XL: LOASACEA. Reichb. Consp. 161. 
Herbs with alternate or opposite leaves without stipules and 
usually showy flowers, the herbage often clothed with bristly 
hairs. Sepals united into an equally 5-lobed calyx, persistent. 
Petals 5 sometimes 10 (the inner series mostly dissimilar) insert- 
ed in the throat of the calyx. Stamens numerous, rarely few or 
definite, inserted with the petals, some of the outer filaments 
often dilated or petaloid and mostly sterile, the others com-. 
monly disposed in fascicles opposite the petals and slightly 
united. Ovary coherent with the tube of the calyx, 1-celled 
with mostly 3:parietal placente; ovules numerous or sometimes 
few rarely solitary, styles usually united into one. fruit 
mostly capsular or succulent, crowned with the’ limb of the 
calyx. Seeds anatropous, usually with move or less fleshy 
albumen. ) 
1 MENTZELIA L. Gen. n. 670. 
Annual or biennial herbs with alternate mostly coarsely 
toothed or pinnatifid leaves and mostly showy flowers. Calyx- 
tu'e cylindrical to ovoid or turbinate; the limb 5-lobed, per- 
sistent. Petals5or10. Stamens numerous, inserted below the 
petals on the throat of the calyx and not adnate to them: fila- 
ments free or in clusters Opposite the petals, filiform, or the 
outer more or less dilated or sometimes petaloid and barren. 
Ovary truncate at the summit, 1-celled: style 3-cleft, the lobes 
often twisted: ovules pendulous or horizontal, few to many in 
one or two rows on the three linear parietal placente. Capsule 
short-oblong to cylindrical, few to many-seeded, opening by 
valves or usually irregularly at the truncate apex. Seeds flat or 
angled. 
§ 1. TracuypHytum T. & G. Fl. i, 5538. Seeds pendulous, 
few to rather many, small, in 1-3 rows, irregularly angled or 
somewhat cubical, not winged, opaque, minutely tuberculate: 
flowers in terminal cymes, mostly small: calyx-limb 5-parted: 
