178 LXViL EPACRiDEiE. {Leiicopogoiu 



Leaves (l^^gc) crowded at tlie ends of each year's shoots, so as to 

 appear verticillate. Ovary 5- or 4-celled. 

 Leaves usually 2 to 5 in. long. Spikes axillary or below the 



leaves. Corolla-tube longer than the calyx, lobes bearded in 



the lower half \, L. verticillatus. 



Leaves about 1 in. long. Spikes terminal. Corolla-tube shorter 



than the ealyx, lobes bearded to the end 2, L. i7iterruptus. 



Leaves scattered. Ovary 2-celled. 



Leaves broad, cordate, auriculatc and stem- clasping. 



Leaves mostly ^ in. long or more. Eastern species . . . S, L. ample j:ic an !is. 

 Leaves under ^ in. long. Stems filiform. Western species , 4. L. a/iennfoHu^- 



Leaves lanceolate. Fruit ovoid, red 5. X. lanceolains, 



Lcavts scattered. Ovary 5-celled (see Ser. 2). 

 Leaves concave. Ovary 5-celled (see Ser. 7). 



Series IL Australes. — Spikes all terminal or also in the tapper axilSy short and 

 detise^ or cylindrical and rather dense {interrupted in L. distaiis). Leaves fat or convex^ 

 with recurved or revolute marghis. Ovary ^-celled or rarely 4- or ^-celled. 



Spikes cylindrical, rather dense. Leaves oblong or lanceolate, 

 finely veined. Ovary 5- or rarely 4-cclled. 

 Leaves mostly i to 1 in. long. Fruit ovoid-globose . . . . 6. /-. RicJiei. 

 Leaves mostly 1 to 2 in. long. Fruit depressed-globose . , , T, L. austraUs. 

 Spikes short and dense (except L. distans). 



Leaves oblong-linear or lanceolate (J to i in. long), erect or 

 spreading. Ovary 5-celled. 

 Leaves tapering into a rigid almost pungent point .... 8. Z. capiiellatus. 

 Leaves obtuse or with a small callous point. 



Sepals obtuse, 1 to li line long. Anthers attached above 



the middle, with prominent sterile tips 9. X. retohdus. 



Sepals acute, 2 to 3 lines long. Anthers attached at or 

 below the middle, tapering and recurved at the end, but 

 2-valved to the tip 10. i- atherolepis. 



Leaves small (under i in.), very convex, very spreading or re- 

 flexed. 

 Ovary 5-celled. 



Spikes short and dense. Flowers under 2 lines long. 



Leaves mostly ovate and 1 line to lanceolate and 2 lines 



long 11. L.rejexus^ 



Leaves mostly narrow-linear, 2 to 3 lines long ... 12. L. eorifolius- 



Spikes interrupted or rarely dense. Flowers above 2 lines 



long 13. L. distans. 



Ovary 3- or rarely 4-ceUed. 



Leaves orbicular, about 1 line diameter. Western species . 14, L. gibbosus. 

 Leaves oblong or lanceolate, hirsute, 2 to 4 or 5 lines long. .. 



Eastern species * , 15. L. thyniijoi^^' 



Leaves small (under i in.), spreading nearly flat. 



Leaves scarcely petiolate, ovate-cordate lanceolate or linear. 



Ovary usually o-ceUed 16. X. cordaW- 



Leaves on long petioles, orbicular. Ovary usually 4-celled . 17- L- Bossiaa- 



Series III, Collinae.— ^'^^j all terminal or also in the uppermost axilsy ^^^^^Lg 

 dense, or cylindrical and rather dense. Leaves flat or convex with recurved or rev 

 or thickened margins. Ovary 2-celled. 



Spikes short, dense or few-flowered. Bracts small. 



Leaves oblong or linear, obtuse or with a callous point (mostly 

 3 to 6 Hnes). ^ ^ ^ 



Trailing or procumbent and hirsute. Flowers very small . 18. I- hirsutus. 

 Erect or diffuse and much branched. 



