_ ROBINSON. — NEW SPERMATOPHYTES, CHIEFLY FROM MEXICO, 9389 
but it differs from that species in its decidedly smaller untoothed 
leaves, which are rounded at the apex. 
Zinnia tenella Robinson, n. sp., erecta gracilis annua tenuiter pilis 
subappressis griseis in novellis copiose pubescens in parte inferiore 
simplex supra saepissime 3-5-ramea 1.5-2.7 dm. alta; foliis tenuibus 
lanceolatis integris utrinque viridibus appresso-puberulis et sparse 
atomiferis obtusiusculi8 3-nerviis patentibus vel deflexis basi cuneatis 
brevissime petiolatis 1.5-3.5 cm. longis 4-10 mm. latis ; capitulis sae- 
pissime 1-5 terminalibus graciliter pedunculatis erectis ca. 7 mm. diam- 
etro (ligulis exclusis) aequi-altis ; involucri campanulati squamis paucis 
(ca. 8) late oblongis obtusissimis subaequalibus appressis tenuiter 
- appresso-puberulis ca. 5 mm. longis; ligulis ca. 5 patentibus late ob- 
longis aurantiacis extus prope apicem saepe viridi-striatulis vel reti- 
culatis minutissime puberulis et granuliferis 7.5 mm. longis 5-6.5 mm. 
latis ; achaeniis florum liguliferorum obovatis concavo-convexis margine 
ciliatis in summa parte bidentatis 4 mm. longis (immaturis) ; corollis 
florum (ca. 15) disci 3 mm. longis sursum leviter ampliatis infra lim- 
um brevissimum aurantiacum plus minusve purpureo-lineatis ; paleis 
: tenuibus ovato-oblongis acutis carinatis ciliolatis apice saepissime au- 
; 
‘ 
ra) Pie ee re eee eee 
rantiacis ; achaeniis obovatis. —Very common on grassy plains and 
hills, Tejamén, Durango, Mexico, alt. about 2135 m., 21-27 August, 
_1906, Dr. E. Palmer, no. 500) (type, in hb. Gray). This species resem- 
bles in many respects Z linearis Benth. It differs, however, in having 
broader leaves and a more slender erect and simple habit. It is espe- 
cially to be distinguished from the related species by its fewer subequal 
involucral scales. 
Cymophora Robinson, n. gen., Compositarum Helianthiearum. 
Capitula homogama parva cymosa; disco parvo leviter convexo ; 
paleis lanceolato-oblongis acutis carinatis flosculos amplectentibus. 
Involucrum anguste campanulatum, squamis paucis ovato-oblongis 
obtusis saepe mucronulatis subherbaceis striatis subaequalibus. Co- 
rollae tubulosae, tubo proprio brevissimo, faucibus cylindratis, limbo 
vel aequaliter 5-dentato vel flosculorum exteriorum plus minusve 
irregulari sed vix radiatiformi. Antherae connatae basi obtusae vel 
obscure sagittato-auriculatae apice distincte appendiculatae. Styli 
rami breves recurvato-patentes filiformes graciliter et distincte appen- 
diculati, appendicibus capillaribus rectis ca. 0.1 mm. longis. Achae- 
nia anguste obconica pilis curvatis longiusculis albis villosa, pappo 
nullo. — Herba annua pubescens et glandulifera ; foliis oppositis late 
ovatis subintegris ; corollis albis; antheris purpurels. : 
C. Pringlei Robinson, n. sp., caulibus laxe oppositeque Tamosis 
/ patente pilosis 3-4 dm. altis; ramis arcuato-curvatis vel flexuosis 
