2G3 



LV. ONAGRACE^I. 



EPILOBIUM. 



possess no remarkable properties. Many genera are ornamental, and one, the well known Fuchsia, is so 

 to a high degree. 



To this order is appended the suborder Haloragetz, consisting of aquatic herbs of a low grade, the 

 flowers being imperfect or reduced to solitary parts or organs. 



FIG. 45. 1. Flower of OEnothera fruticpsa. 2. Plan of the flower. 3. Section of the 4-celled capsule 

 of (E. biennis. 5. Hippuris vulgaris ; 6, its flower, with 1 stamen, 1 ovary, 1 style. 4. Vertical section 

 of its l-seeded fruit. 7. Circsea Lutetiana. 8. The flower enlarged. 9. Plan of the flower. 10. Vertical 

 section of the 2-celled and 2-seeded fruit. 



Conspectus of the Genera. 



Pet. scarcely $ Seeds comose. Epilobium. 

 clawed ; ( Seeds naked. (Enothera. 



\ Claws unarmed. Gaura. 



Herbs. I Pet. clawed; Claws with 2 teeth. Clarkia. 

 ( Sta. 8; < Beautiful green-house shrubs. . Fuchsia. 



$ Fls.perf. { Stamens 4 ; styles united into 1. 

 by 4s; ( Flowers monoecious ; aquatic ; leaves multifid. 

 by 3s; flowers apetalous ; aquatic ; leaves pectinate. 



j by 2s; flowers complete and regular ; leaves dentate. . 

 Parts of fl. arrang'd (.by Is; flowers apetalous ; aquatic; leaves verticillate. . 



Ludwigia. 6 

 Myriophyllum. 9 

 Proserpinaca. 8 

 Circcea. 7 



Hippuris. 10 



TRIBE 1. ONAGREJE. 



Flowers perfect, the parts arranged in 4s (rarely 3s) ; pollen connected by threads. 



1. EPILOBIUM. 



Gr. eirt, upon, \o0ov, apod, tov, a violet; i. e. a violet growing upon a pod. 



Calyx tube not prolonged beyond the ovary, limb deeply 4-cleft, 4- 

 parted and deciduous ; petals 4 ; stamens 8, anthers fixed near the 

 middle ; stigma often with 4 spreading lobes ; ovary and capsule 

 linear, 4-cornered, 4-celled, 4-valved ; seeds 00, comose, with a tuft 

 of long hairs. *4- 



1. E. ANGUSTIFOLIUM. (E. spicatum. Lam.~) Willow Herb. Rose-bay. 

 St. simple, erect ; Ivs. scattered, lanceolate, subentire, with a marginal 



vein ; roc. long, terminal, spicate ; pet. unguiculate ; sta. and sty. declined ; stig. 

 with 4 linear, revolute lobes. In newly cleared lands, low waste grounds, 

 Penn. to Arctic Am. Stem 4 6f high, often branched above. Leaves sessile, 

 smooth, 2 5' long, i as wide, acuminate, with pellucid veins. Flowers nume- 

 rous and showy, all the parts colored, petals deep lilac-purple, ovary and sepals 

 (5 6" long) pale glaucous-purple. Jl. Aug. 



0. canesce-ns. Flowers of a pure white in all their parts ; ovaries silvery- 

 canescent. Danville, Vt. Miss M. L. Towle ! 



2. E. COLORATUM. Muhl. Colored Epilobum. 



St. subterete, puberulent, erect, very branching ; Ivs. mostly opposite, lan- 

 ceolate, dent-serrulate, acute, subpetiolate, smooth, often with reddish veins ; 

 pet. small, 2-cleft at apex ; cal. campanulate ; sty. included ; stig. clavate ; ovules 

 in a single row. Ditches and wet, shady grounds, British Am. to Ga. W. to 

 Oregon. Stem 1 3f high, becoming very much branched. Leaves 2 M long, 

 \ as wide, with minute, white dots, upper ones alternate and sessile, lower on 

 short petioles. Flowers numerous, axillary. Pedicels 1 2" in length, ovaries 

 4 6", capsules 20", very slender. Petals rose-color, twice longer than the 

 sepals. Jl. Sept. Scarcely distinct from the next. 



3. E. PALUSTRE. Marsh Epilobium. 



St. terete, branching, somewhat hirsute ; Ivs. sessile, lanceolate, subden- 



