198 SCROPHULARIACEAE. Vou. III. 
1. Limosella aquatica L. Mudweed. Mudwort. Fig. 3793. 
Limosella aquatica L. Sp. Pl. 631. 1753. 
Limosella tenuifolia Hoftm. iendeohe Fl. 29. 
1804. 
Limosella australis R. Br. Prodr. Fl. Nov. Holl. 
1: 443. 1810. 
Leaves 1’-5’ long, the blade oblong, linear- 
oblong, narrowly linear or spatulate, ob- 
tuse, one-fourth or one-third as long as 
the filiform petiole. Peduncles shorter than 
the leaves, arising with the petioles from 
the base of the plant or from nodes of the 
creeping or floating stem; corolla pink or 
white, about 1” broad, scarcely longer than 
the calyx; calyx-lobes ovate, acute or acut- 
ish, about the length of the tube; stamens 
inserted high up on the corolla-tube; fila- 
ments somewhat longer than the anthers; 
capsule globose or oblong-globose, obtuse, 
14” high, longer than the calyx. 
On muddy shores and in brooks, Labrador 
and Hudson Bay to the Northwest Territory, 
south to New Jersey, and in the Rocky Moun- 
tains to Colorado, and in the Sierra Nevada to 
California. Also in Europe, Australia and 
South America. June—Aug. 
22, SYNTHYRIS Benth. in DC. Prodr. 10: 454. 1846. 
Perennial herbs, with thick rootstocks, simple erect stems, large petioled basal leaves, 
those of the stem much smaller, alternate, sessile, or clasping, bract-like. Flowers small, pink 
or purple, in terminal dense elongated spikes or racemes. Calyx 4-5-parted, the segments 
oblong or linear. Corolla oblong or campanulate, 2-4-lobed, or parted, or wanting, the lateral 
lobes, when present, exterior in the bud. Stamens 2 (occasionally 4), posterior, inserted on 
the corolla, or on the outer side of the hypogynous disk, exserted; filaments slender; anther- 
sacs parallel or divergent, not confluent. Ovary 2-celled or rarely 3-celled; style filiform; 
stigma capitate. Capsule compressed, obtuse, or emarginate, many-seeded, loculicidally dehis- 
cent. Seeds flat, oval, or orbicular. [Greek, closed doors, referring to the capsule-valves.] 
Our species were referred, in the first edition of this work, to the Old World genus Wulfenia. 
About 10 species, natives of North America and Europe. Type species: Synthyris reni- 
formis Benth. 5 
Corolla present, usually 2-lobed. 1. S. Bulli. 
Corolla none. 2. S. rubra, 
1. Synthyris Bullii (Eaton) Heller. Bull’s ae Fig. 3794. 
Gymnandra Bullii Eaton; Eaton & Wright, 259. 1840. 
nan Houghtoniana’ Benth. in DC. Prodr. 10: 454. 
184 
Wulfenia Houghtoniana Greene, Erythea 2: 83. 1894. 
Gymnandra Bullii Barnhart, Bull. Torr. Club 26: 378. 1899. . 
Synthyris Bullii Heller, Muhlenbergia 1: 4. 1900. 
Pubescent; stem stout, 1°-24° high. Basal leaves 
ovate or orbicular, rounded at the apex, truncate, cor- 
date or reniform at the base, crenulate all around, 2’-5’ 
long, 5-7-nerved, petioled, the petiole usually shorter 
than the blade; stem-leaves small, 3’-1’ long, sessile 
or slightly clasping, crenulate, obtuse, or acute, passing 
gradually into the bracts of the dense spike; flowers 
greenish yellow, 2-3” long; corolla present, variously 
2-4-lobed (commonly 2-lobed), little, if any, longer than 
the calyx, its lobes obtuse, the stamens inserted on its 
base; spike much elongated in fruit; capsule emargi- 
nate, slightly exceeding the calyx. 
On dry prairies, Ohio to Minnesota, Michigan and Iowa. 
May-July. 
