ORDER 78. PRIMULACE^E. 501 



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

 or obovate, obtuse, attenuated to the slender petiole ; clusters 20 to 3b-jftowtred, 

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

 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, G 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-lanceolato varying to obovate, membranous 

 viootty ferruginous beneath, obtuse or rather acute ; fascicles ftw (6 to 12)-/ot0. 



long. Jn., JL Variable. (B. tomentosa DC\ B. oblongifolia Nutt.) 



3 B. lycioides Gaert. Glabrous, or nearly so ; Ivs. wedge-tll/ptical, ralher 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; Ivs. obovate, obtuse, small, 

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

 long as the leaf; cor. twice as long as the calyx. Rivers banks, Car. to Fla. A 

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



ORDER LXXVIII. PRIMULACELE. PRIMWORTS. 



Herbs low, with the leaves mostly radical or mostly opposite, with the flowers B- 

 (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 capsule 1-celled, co-seeded; seeds with fleshy albumen. 



Genera 30, speeitx 216, common in the northern temperate regions, growing in swamps, groves 

 by rivulets, anil often among the snow of "cloud-capped mountains." Many are beautiful ancl 

 highly prized in culture. Properties unimportant 



TRIBES AND GENERA. 



I. HOTTONIE.E. Ovary superior. Capsule opening by valves. Leaves pectinate. HOTTONIA. . 1 

 U. PEIMULE.E. Ovary superior. Capsule opening by valves. Leaves undivided. (*) 



* Acaulescent. Corolla lobes spreading, tube cylindrical PRIMULA. 



Corolla lobes spread ing, tube ovoid ANDROSACE. 



Corolla lobes reflexed. Stamens exerted DODEC ATIIEON. 



Stamens included CYCLAMEN. 



* Caulescent Corolla wanting. Leaves opposite : GLACX. 



Corolla "-parted. Leaves in one whorl TKIENTALW. 



Corolla G-partcd. Leaves opposite NAUMBERGIA. 8 



Corolla 5-parted. Leaves opposite or whorled LYSIMACIIIA. 9 



IIL ANAGALLIUE^E. Ovary superior. Pyxis opening by a lid. Flowers 5-parted.... AN AGALLIS. 10 



Flowers 4-parted.CENTENCULL-s. 1J 



IV. SAMOLE.E. Ovary half inferior. Leaves alternate. Flowers 5-parted SAMOLUS. 12 



1. HOTTO'NIA, L. WATER-FEATHER. (To Peter Hotton, professor 

 ip the University of Leyden. Died 1709.) Calyx 5-parted ; corolla 

 salver-form, with a short tube, and a flat, 5-lobcd limb ; stamens in- 

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

 globous-acuminatc. 2 Fleshy, aquatic herbs, with pectinate-pinnatifid, 

 submersed, radical Ivs. 



H. inflata Ell. WATER-FEATHER. Scape articulate, the internodes and lower 

 parts inflated ; fls. verticillate, peduncutote. A curious aquatic plant in swamps 

 and stagnant waters, Mass., R. I. 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 



