HY DROLEACEAE 975 
surpassing the calyx ; tube funnelform, about 6 mm. long; lobes suborbicular 3-3.5 mm. 
broad : capsules slightly over 3 as long as the calyx-lobes. 
In dry soil, Indian Territory and Texas. 
7. Marilaunidium angustifolium (A. Gray) Kuntze. Annual, minutely glandular- 
pubescent. Stems 1—3 dm. tall, dichotomously branched above the base : leaf-blades linear 
or nearly so, 1-3 cm. long, rather obtuse : calyx nearly sessile in the forks ; lobes narrowl 
linear or slightly broadened upward : corolla about 2 mm. long: capsules oblong-ovoid, 
4-5 mm. long. [Nama dichotomum var. angustifolium A. Gray.] 
On plains and prairies, Colorado to Texas and New Mexico. 
8. Marilaunidium origanifólium (H.B.K.) Kuntze. Perennial, softly hirsute. 
Stems diffusely branched, shrubby below, 1-3.5 dm. tall : leaves numerous ; blades oblong or 
oval to obovate, 3-10 mm. long, obtuse, nearly sessile or short-petioled : pedicels slender, 
2-10 mm. long: calyx bristly ; lobes narrowly linear or slightly broadened near the top, 
6-7 mm. long : corolla 7-8 mm. long ; tube funnelform, about as long as the calyx: cap- 
sules oblong, more than 3 as long as the calyx. Nama origanifolium H. B.K.] 
In dry soil, southern Texas and Mexico. 
6. NAMA L. 
Perennial herbs, or shrubby plants sometimes armed with spines. Leaves alternate : 
blades entire. Cymes open or clustered. Calyx often pubescent: lobes almost distinct. 
Corolla blue or rarely white, rotate to campanulate : tube without appendages : lobes 5, im- 
bricated. Stamens 5: filaments inserted at the base of the corolla-tube, dilated at the 
base. Ovary 2-celled or rarely 3-celled. Styles distinct. Stigmas capitate. Ovules 
numerous on each adherent placenta. Capsule ovoid or subglobose, opening septicidally 
often somewhat irregularly. Seeds numerous. [Hydrolea L.] 
Leaf-blades over 5 times longer than broad. 
Flowers in terminal cymes: spines wanting or very few. 
Flowers solitary in the axils of the leaves or in axillary clusters: spines present. 
Stems villous-hirsute: calyx-lobes linear or linear-lanceolate. . N. quadrivalvis. 
Stems glabrous or merely puberulent: calyx-lobes ovate to ovate-lanceolate. 3. N. affine. 
Leaf-blades less than 4 times longer than broad. 4. N. ovatum. 
1. Nama corymbósum (Ell.) Kuntze. Unarmed or nearly so. Stem puberulent 
above, 2-7 dm. tall, simple below, corymbosely branched above : leaf-blades oblong to ob- 
long-lanceolate, 2-5 cm. long, acute, commonly lustrous above, sessile or short-petioled : 
corymbs 5-15 cm. broad, leafy-bracted : pedicels very short: calyx bristly ; lobes linear- 
lanceolate : corolla azure-blue, with yellowish nerves and 5 white spots near the base; 
lobes ovate, obtuse : stamens and style exserted : capsules globular, 4-6 mm. in diameter, 
[Hydrolea corymbosa Ell. ] 
In and about swamps, South Carolina to Florida. Summer. 
2. Nama quadriválvis (Walt.) Kuntze. Spine-armed. Foliage villous-hirsute, 
especially when young : stems often decumbent, 2-10 dm. long, mostly simple : leaf-blades 
narrowly elliptic, sometimes broadest above or below the middle, 4-12 cm. long, acute or 
acuminate at both ends: clusters few-flowered or reduced to a single flower near the top of 
thestem : calyx sparingly pubescent ; lobes linear or linear-lanceolate, 6-8 mm. long, acute : 
corolla blue or lilac, 1-1.5 em. broad ; lobesovate, obtuse : capsules subglobose, 5-6 mm. in 
diameter, surpassed by the calyx-lobes. [Hydrolea quadrivalvis Walt. ] 
In low or muddy situations, Virginia to Florida and Louisiana. Summer. 
3. Nama affine (A. Gray) Kuntze. Spine-armed. Foliage glabrous, or puberulent 
when young: stems sometimes decumbent and creeping, 2-7 dm. long, simple or branch- 
ing : leaf-blades linear-elliptic varying to broadest above or below the middle, 3-10 cm. 
long, acute at both ends, short-petioled : clusters few-flowered, leafy-bracted, short-pedun- 
cled : calyx sparingly hispid ; lobes ovate to ovate-lanceolate, 5 mm. long, acute, ciliate : 
corolla violet, 1.5 em. broad; lobes linear or linear-lanceolate: capsules 6-7 mm. in 
diameter, surpassing the calyx. [Hydrolea affinis A. Gray. ] 
In swampy places, Indiana to Missouri, Mississippi and Texas. Summer and fall. 
4. Nama ovatum (Nutt.) Britton. Spine-armed. Foliage softly pubescent or gla- 
brate in age : stems 2-7 dm. tall, paniculately branched above: leaf-blades ovate to elliptic, 
2-6 cm. long, somewhat acuminate, ciliolate, acute to subcordate at the base, short-pet- 
ioled : panicles leafy-bracted ; clusters terminating the branches : pedicels 2-5 mm. long: 
calyx hirsute ; lobes linear-lanceolate or lanceolate, 7-9 mm. long, acuminate : corolla 
pu or white, about 2 cm. broad ; lobes ovate: capsules globose-ovoid, about 4 mm. 
high. [Hydrolea ovata Nutt.] 
In swamps, Missouri to Louisiana and Texas. Summer. 
y 
. N. corymbosum. 
t2 m 
