EXOGENS. 97 



Nut liirge, horned, 1-celled, 1-seeded. T. nutans, Caltrop, Water 

 Chestnut ; Ivs. triangular, petioles long, swollen, fibrous ; nut 4- 

 horned ; sd. large, edible ; cotyledons unequal. Perisperm 0. S. 

 Eur., Asia. T. bicin-nis, Ling, iCi-CHi, similar; nut 2-horned, like a 

 bull's head ; sd. edible. China. 8. Gatira, terrestrial ; nut 4-oelled, 

 cells 1-seeded. Fls. white or rose. Sev. spec, N. Am. G. Lind- 

 helmeri, %, 3° high, fls. white; Tex. G. biennis, (2), 3°-5° high, fls. 

 rose ; Can. to Ga. 3. Circaea. Fls. 2-merous ; nut 1-2-seeded, 

 bristly, small. C. Lutetidna, Enchanter's Nightshade. Terres- 

 trial ; Q|., 12'-20' high; fls. small, white, racemed. N. Am., Eur. 

 4. Eucharidium, fls. purple or white, 4-merous, reg. ; calyx-tube pro- 

 longed beyond ovary. 0, branching, low ; 2 spec, Cal. 5. Cl^rkia; 

 similar, but petals lobed. Sev. spec. Pacific States. 6. Godetia. 0, 

 low; fls. purple, pink, day -blooming ; otherwise like next. Cal., 

 Columbia R., S. Am. 7, CEnothera, Evening Primrose. Fls. 

 yellow, white, very rarely pink, purple; vespertine, or opening only 

 in bright sunshine. ©, @, Q|.; many spec, erect or stemless. N. 

 and S. Am. CE. biennis, 2°-3° high, Ivs. lance.-oblong ; fls. yellow. 

 PoUen-gr., Fig. 4, 4. U. S. 8. Lopezia, calyx-tube not prolonged ; 

 petals clavved, irreg. 0, slender, branching; fls. small, pink or 

 white. Mex. 9. Jussiaea. Fls. 4-merous, yellow or white ; sta. 

 8-12. Marsh herbs or shrubs ; both worlds. J. grandiflora, Q|. herb, 

 creeping stems ; fls. 2' in diam. Marshes, S. States. Sev. other spec, 

 TJ. S. 10. Epilobium. % herbs. Fls. 4-merous, pink or red ; sta. 

 8; sds. strophiolate. Many spec, both worlds. E. angustifblium, 

 WiLLOw-HEKB. QJ.; 4°-7° high; Ivs. lanceolate; fls. large, pink- 

 purple, racemed ; calyx-tube not prolonged. Boll long, slender. Fig. 

 75. U. S., Eur. U. Zauschneria caZi/orratca. %; l°-2° high ; fls. 

 4-merous, scarlet, 2' long ; sta. 8 ; calyx-tube prolonged beyond 

 ovary ; sds. strophiolate. Cal. 12. Ftichsia. Fls. as in last, but 

 long-peduncled ; calyx very showy ; sds. not strophiolate; fr. a berry. 

 Low shrubs or small trees ; many spec, fls. very showy. Am. ; Mex. 

 to Fuegia. F. excorticdta, F. prociimbens, New. Z. ; only spec, not 

 Am. 



Ord. 88. Haloragese. — Characters of Onagracese, but fls. often 

 diclinous. 10 gen., 80 spec, both worlds. 1. Callitriche, Water 

 Starwokt. Fls. (P, achlamydeous, with or without involucre. 

 Sta. ,1. Stig. 2. Ova. free. Fr. 4 cocci. 0, QJ. ; small, usually 

 aquatic. Lvs. entire, opp. C. Austini, V high, tufted, terrestr. 

 N. Y., N. J., west to 111., S. to Tex., Mex., Cal. C. verna, amphib- 

 ious, stems 3'-12' long. Eur., Penn. to Fla. Sev. other spec, both 

 worlds. 2. Gilmnera. Fls. §, cPi 9 C?' 2-merous; spicate, racemed, 

 panicled. Ova. adh ; drupe 1-celled, 1-seeded. Herbaceous stem ; 

 lvs. rad., usually reniform, large. 11 spec, chiefly in S. hemisphere. 

 G. macrophylla", Java. G. scdbra, PanquJ) ; lvs. very handsome ; 6° 

 in diam. ; Chili. 2. Proserpinaca palustris, P. pectindta, Mer- 

 maid. Fls. SJ , achlamyd., 3-merous ; petals 0; drupe 3-angled, 3- 

 seeded. Small, creeping aquatics ; lvs. lanceolate or pectinate. 

 Swamps, ditches, N. Eng, to Fla., La. 3. Myriophyllum, Water 

 MiLEOiL. Fls. 4-merous ; sta. 4-8 ; petals small or 0. Fr. of 4 

 cocci. Lvs. dissected. Submersed aquatics. Sev. spec, XJ. S. 4. 

 Haloragis. Terrestrial; caulescent; fls. sol., or spiked, racemed, 

 panicled; trop. Asia, Australia, New Z. H. citrioddra, Piri-jIri ; 



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