SCKOPHULARIACEJS. (fIGWOKT FAMILY.) 289 



tig on the wet muddj' bifnks of rivers, with crowded opposite round leaves, and 

 minute solitary flowers sessile in their axils. (Name from rj/u, half, and av6oi, 

 /loiver, in reference to the unequally divided corolla.) 



1. H. micrasithemoidcs, Nutt.— Low banks of the Delaware below 

 Philadelphia. (Perhaps only Micranthemum.) 



14. l.imOSi:L.L.A, L. MoDwoRT. 



Calyx bell-shaped, 5-toothed. Corolla short, widely bell-shaped, 5-elcft, 

 nearly regular. Stamens 4 : anthers conflucntly 1-eclled. Stylo short, club- 

 sliapcd. Pod globular, many-seeded ; the partition thin and vanishing. — Small 

 annuals, growing in mud, usually near the sea-shore, creeping by slender run- 

 ners, witliout ascending stems ; the entire fleshy leaves in dense clusters around 

 the simple 1-flowered peduncles. Flowers small, white or pui-phsli. (Name a 

 diminutive of livnis, mud, in wliich these little plants delight to grow.) 



1. li. aqudtica, L. . var. tenuifdlia, Hoffm. Leaves (with no 

 blade distinct from the petiole) awl-shaped or thread-form. (L. tenuifolia, JVutt. 

 L. subulata. Ires.) — In brackish mud, from New Jersey northward. Aug. — 

 Plant 1'- 2' high. (Eu.) 



15. Si'NTHYBIS, Benth. Synthtris. 



Calyx 4-parted. Corolla somewhat bell-shaped, variously 2 - 4-lobed or cleft. 

 Stamens 2, inserted just below the sinuses on each side of the upper lobe of the 

 corolla, occasionally with another pair from the other sinuses, exserted : anther- 

 cells not confluent into one. Style slender: stigma simple. Pod flattened, 

 rounded, obtuse or notched, 2-grooved, 2-ceUed (rarely 3-lobed and 3-celled), 

 many-seeded, loculicidal; the valves cohering below with the columella. — 

 Perennial herbs, with the simple scape-like stems beset with partly-clasping bact- 

 liko alternate leaves, the root-leaves rounded and pctiolod, crcnate. Flowers in 

 a raceme or spike, witli braeted pedicels. (Name composed of trliVftogetlier, and 

 6vpls, a little door; evidently in allusion to the closed valves of the pod.) 



1. S. Houg^htonistna, Benth. Hairy; root-leaves round-ovate, heart- 

 shaped ; raceme spiked, dense (5' - 12') ; corolla not longer than the calyx, usu- 

 ally 2-.3-pai-ted. — High prairies and lulls, Wisconsin, Houghton, Lapham. 

 Michigan, Wright. Illinois, Mead. May. — Corolla gi-eenish-white, for the 

 most part deeply 2-parted, with the upper lip entire, a little longer and narrower 

 than the lower, which is 3-toothed ; often 3-parted, with the upper lip notched 

 or 2-lobed. When there are 4 stamens the lower are later than the others. 



16. VEB«ilVICA, L. Speedwell. 



Calyx 4-parted. Corolla wheel-shaped or salver-shaped, the border 4-parted 

 (rarely 5-parted) ; the lateral lobes or the lower one conimonly nan-ower than 

 the others. Stamens 2, one each side of the upper lobe of the corolla, exserted ■. 

 anther-cells confluent at the apex. Style entire : stigma single. Pod flattened, 

 usually obtuse or notched at the apex, 2-ccllcd, few - many-seeded. — Chiefly 

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