180 
RUBIACEA2. (MADDER FAMILY.) 
seeded, opening loculicidally across the summit. — Mostly small 
herbs, with small stipules united to the petioles. (Name from 
rjbvs, sweet , and ovs , wroy, an ear , of no obvious application. — 
Ifoustonia, now included in this genus, was dedicated to Dr. Hous¬ 
ton, an early English botanist.) 
§ 1. Elatinella, Torr. &. Gr. — Corolla wheel-shaped , much shorter 
than the leaf-like calyx-lobes: style scarcely any : pod wholly invest¬ 
ed by the adherent calyx , many-seeded: stipules 2-pointed . 
H. glomeraXa, Ell. Stems branched and spreading, hairy; 
eaves oblong, narrowed at the base, smoothish ; flowers (inconspicu¬ 
ous) clustered in the axils ; corolla white. (J) — Mostly in brackish 
swamps, New York near the city, and New Jersey southward. A 
homely plant, 2 f - 12' high. 
§ 2. Amphiotis, DC. — Corolla funnel-form , longer than the calyx- 
teeth: pod globular or ovoid , the upper half free from the calyx , with 
- o seeds in each cell: perennial , upright: stem-leaves sessile: 
Jloicers in terminal 2—3-forked or panicled few-flowered cymes, some 
p ants icah exserted stamens and short included style , others with 
deeply included stamens and exserted style ! 
j . Torr. & Gr. Pubescent ; leaves ovate or 
ate, c o&ely sessile, 3-5 -nerved; calyx-lobes longer than the pod. 
ft/ i-Tr- u dS ’ J V * Penn * and ° hio southward. May - July.—Stems 
: ' S . F1 r rS 3-7 “ a cluster . Pink-purple 
tkirLh C *^*°*‘ 1 * a * Torr. Low, nearly smooth ; stems tufted, the 
. w s P a tulate and ciliate root-leaves in close rosettes; stern¬ 
er Z: b r g - U 7 ar ' ° kUSe ’ obscurel y 1 -nerved; calyx-lobes not long- 
Ja to M *I PO ~; R0Cky banks > N ' York (Oswego), and Niag- 
pod n r ed; calyx - ,obe9 ™ iy as iong ° s,h ! 
slender branches with H ^ j larrower leaves, many spreading and 
to Michigan • the vf Peduncles.-Shaded banks, Maine 
kigh, bluish-white or paleYur^ Sta ‘ eS ' June ’ “ S,e “ S 5 '" 
§ 3. Houst6nia I .. . 
Pod somewhat'Uobed Ta ^ ^ 
calyx: the cells 8-2fL * summit > whic ^ is free from the 
terminal and axillan T* * de ^ cate perennials or biennials , with 
style conversely of 2r T 1 '^ <nccrc d peduncles: the stamens and 
5. If. Un Z th * ** different individuals, as in § 2. 
OUS, slender*^*^ S| ^°° k ' ( ® LCETS ) Smooth ; stems nuroer- 
& > p ng y branched % } leaves oblong-spatulate, 
