94 PITTONIA. 
of L. Redowskii, a number of easily definable species; and 
there is no determining to what one of the segregate species 
the name should be applied rather than to another. More- 
over, the earliest known cupulate species obtained specific 
rank far anteriorly to the publication of L. Redowskii, var- 
cupulatum ; I refer to 
L. TExANA, first published as Echinospermum Texanum 
by Scheele, Linnea, xxv, 260. Any one who can read 
Scheele’s characterization of the species must see that it had 
cupulate nutlets; and Gray cited it as a synonym of his var. 
cupulatum. The original is said to have been found growing 
under mesquite bushes near San Antonio, Texas; but I have 
not yet seen any specimens that answer well the description. 
L. CORONATA. Annual, erect, only a few inches high, 
with few ascending branches and a rather broad oblong 
foliage: nutlets all alike, whitish, the body entirely devoid 
of tubereulation or murication, very smooth or else merely 
wrinkled, marked by a distinet but only slightly raised 
dorsal ridge, and cireumseribed by an elevated rounded and 
crown-like inflated margin which bears a row of very short 
prickles glochidiate at the tip. 
On mesas near Tucson, Arizona, collected 18 April, 1884, 
by C. G. Pringle. Species very different, both in habit and 
the character of the nutlets, from all others, The aperture 
of the crown, through which is seen the low smooth or 
wrinkled and ridged back of the nutlet, is broadly and 
roundly ovate. 
L. HETEROSPERMA. Larger than the last, diffusely branch- 
ing from the base, or the starved specimens more upright 
and less branching, but with no tuft or rosula of basal leaves ; 
all the branches floriferous from the base and loosely so, each 
flower subtended by a leafy bract, this far surpassing even 
the mature fruit: nutlets dissimilar, 3 with an elevated 
coroniform thickened and aculeate border, forming an ovate 
