EPILOBIUM.] ONAGRARIE^. 145 



Spongy rills, &c. in alpine and subalpine districts, Wales, N. of England, and 

 Scotland, ascending to near 2,900 ft. ; absent from Ireland ; fl. July. 

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

 Stem 4-12 in., simple or branched, flexuous, subsucculent. Leaves 1-2 in., 

 like those of E. montanum, flaccid, bright green. Flowers 4j in. diam., few, 

 bright rose-purple. Capsule 1^2 in., almost glabrous. DISTRIB. Arctic, 

 Northern and Mts. of Mid. Europe, E. and W. N. America. 

 10. E. alpinum, 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, of Scotland only, ascending to near 4,000 ft. ; fl. July. Stolons 

 rosulate, aestival. Stem usually ascending, 3-9 in., slender, simple, often 

 curved. Leaves J-f in., few, shortly petioled. Flowers 1-3, -| \ in. diarn.. 

 bright or pale rose-purple. Capsules \-\\ in., almost glabrous. DISTRIB. 

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



VAR. anagallidi/o'linm, Lamk. (sp.) ; stolons elongate with opposite .pairs 

 of greeri leaves, flowers small pale. The commonest form. 



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, 

 persistent. 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 sep- 

 ticidal or dehiscing by terminal pores, or irregularly rupturing longitu- 

 dinally. Seeds minute. DISTRIB. Temp, and warm regions, chiefly of N. 

 America ; species 20. ETYM. C. G. Ludwig, a Leipsic botanical professor. 

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

 nar'dia, L. 



Boggy pools, Buxted, Sussex ; Petersfield Heath and Brockenhurst, 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. Europe from Ham- 

 burg southwards, N. Africa, Mid. Asia, E. and W. N. America. 



2*. (ENOTH'ERA, L. EVENING PRIMROSE. 



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

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

 gate, 4-angled ; limb cylindric, 4-lobed, deciduous. Petals 4. Stamens 8 ; 

 anthers usually long. Ovary 4-celled ; style filiform, stigma capitate entire 

 or 4-lobed ; ovules many, 1-2-seriate, horizontal or ascending. Capsule 

 4- rarely 1 -celled, splitting from the top downwards into 4 septiferous 

 valves, usually leaving the seeds on the axis, sometimes indehiscent. Seeds 

 many or few, sometimes appendaged. DISTRIB. Temp. N. and S. America, 

 rarely tropical ; one is Tasmanian ; species 100. ETYM. obscure. 



