HYDKOLEACEAE 975 



surpassing the calyx ; tube funnelform, about 6 mm. long ; lobes suborbicular 3-3.5 mm. 

 broad : capsules slightly over 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 narrowly 

 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 origanifolium (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 | as long as the calyx. [jVama 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 : lofoes 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. 1. N. corymbosum. 

 Flowers solitary in the axils of the leaves or in axillary clusters : spines present. 



Stems villous-hirsute : calyx-lobes linear or linear-lanceolate. 2. N. quadrivalvis. 



Stems glabrous or merely puberulent : calyx-lobes ovate to ovate-lanceolate. 3. N. afflne. 



Leaf-blades less than 4 times longer than broad. 4. N. ovatum. 



1. Nama corymbosum (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 quadrivalvis (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 

 the stem : calyx sparingly pubescent ; lobes linear or linear-lanceolate, 6-8 mm. long, acute : 

 corolla blue or lilac, 1-1.5 cm. broad ; lobes ovate, 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 cm. 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 

 purplish 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. 



