URTIUACE^. 155 



35. XJ. expansa, Gr. Woody ; leaves elliptical or elliptical-oblong, bluntish or point- 

 leted, usually emarginate at the base, crenate (rarely sinuate-repand), glabrous ; cymes axil- 

 lary or lateral, peduncled, many times divaricate-dicholomous ; $ flowers long-pedicellate ; 

 achenium . . . . — Urtica, Sw. !, adnot. — Nearly allied to the preceding ; leaves 7 "-3" long, 

 3"-l" broad. — Hab. Jamaica \, Sw., March, Wullschl., in the southern districts. 



36. XJ. baccifera, Gaud. Shrubby or arborescent, often prickly ; leaves oval or round- 

 ish, sinuate-dentate, glabrous or glabrescent ; cymes lateral, many times trichotomous ; <j> 

 flowers pedicellate ; achenium exceeding the baccate calyx. — Jacq. Schcenbr. t. 387 ; 

 Desc. Fl. 6. ;?. 433.— Urtica, L., Sw..'— W-12' high, or lower; leaves 4"-12" long.— 

 Hab. Jamaica!, Wils., March; Trinidad!, Cr. ; [Cuba! and Central America! to Southern 

 Brazil!]. 



'* Cymes contracted into branched or simple spikes ; rhaphides on the upper leaf -side 



numerous, linear. 



37. XJ. crassifolia, Wedd. I Woody ; leaves oval-roundish, bluntish, rounded at the 

 base, crenate or subentire, triplinerved, long-petioled, glabrous or glabrescent beneath ; <J 

 flower-clusters in axillary, branched spikes, which are exceeded by the petiole ; achenium 

 . . . .—Leaves 10"-6" long, 8"-5" broad : petiole 5"-3" long ; ? unknown.— Hab. Domi- 

 nica !, Tmr. 



38. XJ. microcarpa, Wedd. ! Shrubby or arboreous ; leaves elliptical-oblong, point- 

 leted, bluntish at the top, rounded or cuneate at the base, crenulate or subentire, ^-nerved, 

 glabrous or glabrescent beneath on the nerves; flower-clusters of both sexes in axillary 

 branched spikes which exceed the petiole ; achenium exceeding the calyx. — A low tree or 

 shrub ; leaves 4''-3" long, 2"-l k broad, membranaceous : petiole 12"'-6'" long. — Hab. 

 Jamaica !, Mac/., Wils., JL, in the central and northern hills. 



39. XJ. spicata, Wedd. ! Woody ; leaves oblong or elliptical-oblong, bluntish at the 

 pointed top, emargiuate at the base, repand-eutire, S-nerved, glabrous : ? flower-clusters in 

 axillary, subsessile, simple spikes, which are nearly as tongas the petiole ; achenium exceed- 

 ing the calyx. — Leases 5"-2" long, 1|"-1" broad, papery: petiole 8"'-4"' long. — Hab. 

 Jamaica !, Hist. 



Subtkibf. 2. PROCUIDE2E. — Segments of ? calyx usually 3. Stigma penieillate. — 

 No stinging hairs. Herbs ; leaves opposite in the West Indian species. 



13. PILEA, Lindl. 



Calyx <? 4 (-2) -partite, ? 3 (-2-4) -partite, with one segment larger and usually gibbous 

 below the top. — Leaves usually bearing rhaphides: one leaf (of the pair) often larger than 

 the other : stipvles axillary ; cymes axillary. 



§ 1. leaves small, uninerved.— Stem diffuse, flaccid. 



40. P. microphylla, Liebm. Glabrous; leaves obovate or roundish, quite entire, 

 uninerved -. rhaphides on their upper side mostly transverse, linear ; cymes subsessile, con- 

 tracted, exceeded by the leaves, usually androgynous. — Stem many-branched, annual or 

 suffrutescent, somewhat succulent ; leaves unequal (in the pair) : the smaller resembling the 

 stipules. The different forms of this variable species look like distinct species, but their 

 characters are of no value : — 



a. Leaves minute (l"'-2i"' long), obovate, with a bluntish point, smooth beneath : all 

 rhaphides parallel, transverse, or the marginal ones arcuate. — SI. t. 93./*. 2. — Parietaria, L. 

 Urtica, Sw. ! Pilea muscosa, Lindl. 



0. trianthemoides, Lindl. Leaves larger (4 '"-8"' long), obovate, rounded at the top, 

 somewhat punctate beneath : rhaphides parallel, transverse, or mixed with several oblique 

 ones. — Urtica, Sw. ! 



y. succulenta. Leaves orbicular 0-\ m -2\ w diam.), rounded or shortly cuneate at the 

 shortly petioled base, foveolate beneath, deciduous : transverse and oblique rhaphides usually 



mixed. Urtica trianthemoides, var., Sw. Herb. — Stem suffrutescent, succulent. Allied to 



this is U. herniarioides, Sw. !, a Haiti form, with an annual, filiform stem. 



