ORDER XCV. PRIMULACE^. 479 



long, slender; upper lip of the corolla large, slightly 3-lobed, lower 

 lip smaller; spur subulate, emarginate. — Yellow. 1C. Sept. — Oct. 

 2—3 feet 



S. U. BiOOl ta, (Le Conte.) Stem submersed, glabrous, terete. Leaves 

 alternate, 4 — 5-parted at the base, segments divided, with setaceous 

 segments ; peduncles axillary, 1 — 2, generally 1-fiowered ; upper lip 

 of the corolla nearlv round, shorter than the lower; the middle segment 

 of the lower lip oval, with reflexed margin ; spur subulate, covered by 

 the reflexed margins of the middle segment. — Purple. 11. June — July. 

 Stagnant waters. Common. 1 — 2 feet. 



4. U. loxgieos'tris. (Le Conte.) Stem floating. Leaves divided, with 

 setaceous segments. Flowers on peduncles 2 — 3 inches long, 2-flowered ; 

 lips of the corolla obscurely 3-lobed, the lower one emarginate, ascend- 

 ing. — Yellow. 21. June. Stagnant water. Car. and Geo. 



5. U. gib'ba, (L.) St€7n floating ; peduncle 6 — 8 inches long, bearing 

 s«:- vt-ral small flowers. Corolla with the lips obscurely lobed ; spur 

 shorter than the lower lip of the corolla, gibbous in the middle. — Yel- 

 low. IX. June. In ponds in the low country. 



6. U. biparti'ta, (E1L) Scape 2 — 4 inches high, bearing generally 

 several flowers. Corolla small ; lips nearly entire; equal; spur obtuse, 

 half the length of the corolla; lower segment of the calyx generally 2- 

 cleft — Yellow. U . October. In muddy places. 



7. U. biflo'ea, (Le Marck.) Stem submersed, slender. Leaves verti- 

 cillately divided with setaceous segments. Flowers on axillary pedun- 

 cles ; peduncles long (3 — 4 inches), generally 2-flowered ; lips of the 

 corolla entire, or the upper one obscurely 3-lobed, reflexed, shorter 

 than the lower; spur subulate. — Yellow. IT. May — June. In stag- 

 nant water. 



8. D". peesoxa'ta, (Le Conte.) Scape 1 — 2 feet high, slender, glabrous, 

 leafless. Flowers 4 — 10, rather large ; upper lip emarginate ; spur 

 subulate, slightly curved. — Yellow. 21. July — Aug. In damp soils. 

 Middle Car. and Geo. 



9. U. seta'cea, (Mich.) Stem erect, setaceous, nearly leafless, with 

 a few ovate scales. Flowers on short, setaceous peduncles, 4 — 7 ; lower 

 lip 3-lobed, upper lip ovate ; spur subulate ; the lower lamella of the 

 stigma incised. — Yellow. IX . April — May. Wet soils. Common. 



Order XCV.— PRIMULA'CE^E. {Primrose Family.) 



Calyx divided, 4 — 5-cleft, inferior, regular, persistent. Co- 

 rolla hypogynooa, regular ; limb 4 or 5 cleft. Stamens insert- 

 ed upon the corolla, opposite to its segments. Ovary 1-eelled. 

 1. Stigma capitate. Capsule with central placentae. 

 Seeds numerous, peltate ; embryo straight, cylindrical. Her- 

 baceous plants, with opposite or whorled leaves. 



Gents I.— LYSIMA CHIA. L. 5—1. 

 (From the Greek lu^is, dissolution, and mache, strife.) 



Calyx 5-parted. Corolla rotate, 5-cleft. Stamens 5. Stig- 

 ma 1. Capsule 10-valved, globose. 



