Obdkb 18.— PBIMULACB^. 501 



1 B. tenax Willd. Clusters and Ivs. beneath silky-feiragmous ; Ivs. wedge-oblong 

 or obovate, obtuse, attenuated to the slender petiole ; clusters 20 to Zb-fiowered, 

 pedicels 3 to 5 times longer than the flowers, longer than the petioles ; cor. and 

 appendages exceeding the calyx ; drupe oval. — Dry sandy soils, S. Car. to Fla. 

 and La. Tree 20 to 30f high, with tough twigs (as all the rest have). Spines 

 Stout, 6 to 12' long. Lvs. 2 to 3' long, 5 to 8" wide, shining, rusty or tawny but 

 glistening beneath. Drupe beautifully corrugated when dry. Jn., JL 



2 B. lanuginosa Pers. Lvs. oval-lanceolate varying to obovate, membranous 

 woolly ferruginous beneath, obtuse or rather acute ; fascicles few (6 to \2)-flow- 

 erred, pedicels short, but as long as, or longer than the petioles, both woolly ; drupe 

 globular. — Wet soils, S. 111. to Car. and La. Shrub 8 to 12f high, with spreading, 

 spiny branches. Lva 18" to 3' long, woolly, not sUky beneath. Pedicels 2 to 4' 

 long. Jn., Jl. — Variable. (B. tomentosa DC., B. oblongifolia Nutt.) 



3 B. lycioides Gaert. Glabrous, or nearly so ; lvs. wedge-elliptical, rather acute, 

 attenuated to the slender petiole ; clusters densely (20 to 30)-flowered ; pedicels 

 twice longer than the fls. but rather shorter than the petioles ; cor. near twice longer 

 than the cal. — Damp soils, Ky., N. Car. to La. A small tree with the branches 

 nearly straight. Spines on the older branches short, stout. Lvs. including the 

 petiole 2 to 3' long, pedicels 3", fl. 1", greenish-white. May, Jn. 



4 B. reclinata Vent. Glabrous ; branches divaricate ; lvs. obovate, obtuse, small, 

 narrowed to a short petiole ; clusters 15 to 20-flowered ; pedicels slender, half as 

 long as the leaf; por. twice as long as the calyx. — Elvers banks, Car. to Fla. A 

 straggling shrub. Lvs. scarcely 1' long. Jn., Jl. 



Order LXXVIII. PEIMULACE.^. Primwoets. 



Merbs low, with the leaves mostly radical or mostly opposite, with the flowers 5- 

 (rarely 4 to 6)-parted, regular and monopetalous, the stamens 5, inserted on the 

 corolla tube and opposite to its lobes, the ovary one-celled, with a free central pla- 

 centa, style 1, stigma 1, the capsuie 1-celled, oo-seeded ; seeds with fleshy albumen. 



Gm-era 30, speoies 216, common in the northern tempcrnte regions, growing in swamps, groves 

 b7 rivulets, nnd oi'ten Among the snow of "cloud-capped mountains. Many are beautiful and 

 highly prized in culture. Properties unimportant, 



TEIBiS AND GBNBEA. 

 I. HoTTONlE^. Ovary superior. Capsule opening by valves. Leaves pectinate. Hottonia. . 1 



II. Peimtjleje. Ovary superior. Capsule opening by v.ilves. Leaves undivided. (*) 



* Acaulescent Corolla lobes spreading, tube cylindrical PutMTTLA. 2 



— Corolla lobes spreading, tube ovoid Androsacb. 3 



— Corolla lobes refiexcd. — Stamens exerted Dodecatheok. 4 



— Stamens included Cyclamen. 5 



/♦Caulescent — Corolla wanting. Leaves opposite : Glaux. 6 



— Corolla 7-parted. Leaves in one whorl Teientalis. 7 



— Corolla 6-parted. Leaves opposite Naumbeegia. 8 



— Corolla 5-parted. Loaves opposite or whorled. Li^.siMACUlA. 9 



III. Anaga.llii>e^. Ovary superior. Pyxis opening by a lid — Flowers 5-parted.... Anagallib. 10 



— riowers4-parted.CENTENCULU8. 11 

 IT. Samole^. Ovary half inferior. Leaves alternate. Tlowers 5-parted Samclcb. 12 



1. HOTTO'NIA, L. Watbr-feathkr. (To Peter Hotton, professor 

 in the University pf Leyden. Died 1709.) Calyx 5-parted ; corolla 

 salver-form, with a short tabe, and a flat, 5-lobed limb ; stamens in- 

 serted in the tube of the corolla, included ; stigma globous ; capsule 

 globous-acuminate. — If Fleshy, aquatic herbs, with pectinate-pinnatifid, 

 submersed, radical lvs. 



H. infldta EU. ■Water-feathbu. Scape articulate, the internodes and lower 

 parts inflated ; fls. vertioillate, pedunculate. — A curious aquatic plant in swamps 

 and stagnant waters, Mass., R. L and Ct., N. Y. to Fla. and La. Stem immersed, 

 round, thick, spongy, with a whorl of finely pectinate leaves (1 to 2' long) at or 

 near the surface of the water. Peduncles or scapes several together arising in a 



