158 ONAGEAEIEJE. [EPILOBIUM. 



9. E. alsinefo'lium, Vill. ; almost glabrous, stems tufted ascending 

 with 2-4 obscure pubescent lines, leaves usually opposite subsessile ovate 

 or ovate-lanceolate acuminate toothed glabrous shining, buds drooping 

 obtuse, seeds narrow clavate, testa produced at the tip. 



Spongy banks of rills, &c., in alpine and subalpiue districts, Wales, and from 

 Westmoreland and Durham to Shetland ; ascends to near 2,900 ft. ; fl. July. 

 Stolons sestival, subterranean, filiform, scaly, bearing in autumn a scaly bud. 

 Stem 4-12 in., flexuous, subsucculent. Leaves 1-2 in., as of E. monta'num, 

 flaccid, bright green. Flowers \ in. diam., few, bright rose-purple. Capsule 

 l|-2 in., almost glabrous. DISTRIB. Europe (Arctic), N. and W. Asia to 

 Himalaya, America. 



10. E. alpi'num, L. ; small, slightly pubescent, stem with 2 pubescent 

 lines, leaves opposite elliptic-oblong obtuse entire or toothed, buds obtuse 

 and flowers pendulous, seeds narrow -obovoid, testa not produced. 



Alpine rills, from Durham and Cumberland to Sutherland ; ascends to near 

 4,000 ft. ; fl. July. Stolons sestival, rosulate, or elongate (E. anagalli- 

 difo'lium, Lamk.). Stem usually ascending, 3-9 in., slender, simple, often 

 curved. Leaves - in., few, shortly petioled. Flowers 1-3, ^-f in. diam., 

 bright or pale rose-purple. Capsule 1-1J in., almost glabrous. DISTRIB. 

 Arctic and Alpine Europe, Asia, Himalaya, N. America. 



2. LUDWIG'IA, L. 



Annual or perennial herbs, sometimes aquatic. Leaves opposite or alter- 

 nate, quite entire. Flowers usually axillary solitary and sessile ; peduncles 

 2-bracteate. Calyx-tube cylindric or angled or turbinate ; lobes 3-5, per- 

 sistent- Petals 3-5 or 0, and stamens (3-5) inserted under the margin of 

 an epigynous disk. Ovary 4-5-celled ; style short, stigma 3-5-lobed ; 

 ovules many, in many series, on prominent axile placentas. Capsule 

 septicidal or dehiscing by terminal pores, or irregularly rupturing longi- 

 tudinally. Seeds minute. DISTRIB. Temp, and warm regions, chiefly of 

 N. America ; species 20. ETYM. C. G. Ludwig, a Leipsic botanist. 



L. palus'tris, Elliot; leaves all opposite ovate or elliptic. Is- 



nar'dia, L. 



Boggy pools, very rare, Sussex and Hants ; Jersey ; fl. June-July. Glabrous, 

 perennial. Stem 6-10 in., rooting at the nodes, procumbent or floating, 

 4-angled, branched. Leaves |-1 in., petioled, acute, shining. Flowers 

 4-merous, minute, axillary, sessile, green ; bracts subulate. Calyx-tube in., 

 oblong, truncate, with 4 green ribs ; lobes triangular, acute. Petals (or 

 small and red in American specimens). Style short, stigma large capitate. 

 Seeds angular. DISTRIB, From Hamburg southd., S. Africa, W. Asia, 

 N. America. 



2*. (ENOTHE'RA, L. EVENING PRIMROSE. 



Herbs, rarely shrubby. Leaves alternate. Flowers axillary, solitary or 

 in leafy spikes or racemes, large, yellow red or purple, honeyed. Calyx- 

 tube elongate, 4-angled ; limb cylindric, 4-lobed, deciduous. Petals 4. 



