LOASACEAE 809 
by filiform or petal-like staminodia. Anthers introrse. Gynoecium of 2-5 united 
carpels. Ovary 1-celled, inferior. ‘Styles 2-5, sometimes united. Ovules solitary 
or numerous at the top of the cavity or on parietal placentae. Fruit a ribbed or 
angled straight or spiral capsule. Seed with a membranous, cellular or reticu- 
lated testa. Embryo straight in the fleshy or rarely horny endosperm or this 
wanting. 
Stamens numerous : style lobed : capsules several-many-seeded. 
Filaments inserted below the petals : style 3-lobed : placentae 3. 
e 
Outer filaments not petal-like : seeds in 1 row, ascending, angled, wingless. 1. MENTZELIA. 
Outer filaments petal-like : seeds in two rows, horizontal, flattened, winged. 2. TOUTEREA. 
Filaments inserted with the petals and adnate to their bases: style 5-lobed: pla- 
centae 5. 3. EUCNIDE. 
Stamens 5: style entire: capsules 1-seeded. 4. CEVALLIA. 
1. MENTZELIA L. 
Annual, biennial or perennial herbs, usually armed to the corolla with hooked or 
barbed rigid hairs. Bark often papery. Leaves alternate : blades relatively broad, sinuate, 
or lobed. Sepals 5, persistent. Petals 5, equal, deciduous. Stamens numerous. Ovary 
with 3 parietal placentae. Capsule dry, irregularly opening or 3-valved at the top. Seeds 
several, angled, ascending, wingless. à 
Flowers and capsules sessile in the forks of the branches: petals abruptly pointed. 1. M. oligosperma. 
Flowers and capsules short-pedicelled : petals truncate and often with a minute 
apiculation, 2. M. Floridana. 
1. Mentzelia oligospérma Nutt. Stems erect or ascending, 3-10 dm. long, branched 
at the base or throughout, sometimes diffusely so, brittle: leaf-blades ovate to oblong, more 
or less rhombic, 1.5-6 em. long, coarsely toothed or slightly lobed : flowers sessile: hypan- 
thium bristly: sepals narrowly linear-lanceolate, 5-7 mm. long, rigid: petals yellow, 
obovate or elliptic-obovate, 8-9 mm. long, abruptly pointed, barely distinguishable into 
blade and claw : capsules cylindric-prismatic, nearly 2 cm. long. 
On prairies and plains, Illinois to Colorado, Louisiana, Texas and Mexico. Spring and summer. 
2. Mentzelia Floridana Nutt. Stems branching at the base, the branches trailing or 
climbing, 5-18 dm. long, pale : leaf-blades firm, ovate to deltoid-ovate, 2-8 cm. long, 3-lobed, 
toothed, acute at the apex, truncate at the base, the terminal lobe the largest: hypanthium 
densely pubescent: sepals lanceolate, 5-6 mm. long, acuminate: corolla golden yellow, 
fully 2 em. broad : petals cuneate, truncate, and often with a minute apiculation, spreading : 
capsules cylindric-prismatie, 1-1.5 cm. long, 6-seeded. 
In sandy soil, peninsular Florida and the Keys. Spring and summer. 
2. TOUTEREA Eaton & Wright. 
Herbs, pubescent like Mentzelia, with diffuse or climbing stems. Leaves alternate : 
blades relatively long and narrow, sinuate or pinnatifid. Sepals 5, persistent. Petals 5, 
often apparently 10 on account of the petal-like outer filaments. Stamens numerous: fila- 
ments various, the outer petal-like. Ovules in 2 rows on each placenta. Capsule rela- 
tively stout. Seeds numerous, horizontal, flattened, winged. The plants flower mainly in 
the summer. 
Petals less than 1 em. long: sepals about 14 as long as the capsule. 1. T. Wrightii. 
Petals over 1 em. long : sepals about 14 as long as the capsule. 9r ultioni. 
Petals 1.5-2 em. long: capsules about 5 mm. thick. h 
Petals 2.5-3.5 cm. long: capsules about 10 mm. thick. 3. T. stricta. 
l. Touterea Wrightii (A. Gray) Rydb. Stem 3-9 dm. tall, somewhat corymbose 
above: stem-leaves few ; blades oblong to lanceolate, 2-8 cm. long, sinuate, rather obtuse : 
flowers several : sepals lanceolate, acuminate, about ] as long as the mature hypanthium: 
petals ochroleucous, 5-8 mm. long, obtuse: capsules cylindric, 2-2.5 cm. long. 
On plains and prairies, Texas and New Mexico. 
2. Touterea multifldra (A. Gray) Rydb. Stem 3-8 dm. tall, widely corymbose 
above : leaf-blades oblanceolate on the lower part of the stem to narrowly oblong or lance- 
olate above, 2-10 em. long, pinnatifid, the teeth narrow, mainly acute : sepals lanceolate 
from a narrow base, about 4 as long as the mature bypanthium : petals golden yellow, 1.5-2 
cm. long, abruptly pointed : capsules slender, about 5 mm. thick. , 
In dry or stony soil, Colorado to Texas and New Mexico. 
