216 
delicate scales around the broad flat summit.—Plains and prairies of central and 
western Texas, where the most common form is var. PULCHERRIMA Torr, & Gray, with 
a part or even the whole upper face of the ray brown-purple. 
** Achenes completely flat. 
3. L. peduncularis Torr. & Gray. Strigose-scabrous or pubescent and somewhat 
cinereous, 6 to 9 dm. high including the naked peduncle of 3 dm, or more: leaves 
rather large, irregularly bipinnately parted or pinnately parted, and some of the 
lobes incisely pinnatifid or toothed: rays obovate, 2.5 cm. or less long and pure 
yellow, or sometimes only 6 mm. long and particolored: disk cylindrical, the largest 
3.5 cm. long: achenes broadly obovate, from narrowly to broadly winged and deeply 
notched at summit by an extension into 2 unequal chaffy teeth, the notch fringed 
with small irregular scales.—Low ground. Near the coast, and in sandy woods, is var. 
picra Gray, with more cinereous pubescence, simply and lyrately pinnately parted 
leaves with incised divisions, and rays barely 12 mm. long and brown-purple with 
a yellow edge. 
63. BORRICHIA Adans. (SEA OX-EYE.) 
Shrubby low coriaceous or fleshy maritime plants, with opposite 
nearly entire leaves, solitary peduncled terminal heads of yellow flowers, 
fertile rays, hemispherical involucre with imbricated bracts, flat re- 
ceptacle covered with lanceolate rigid persistent chaff, wedge-shaped 
3 or 4-angled achenes, and pappus a short 4-toothed crown. 
1. B. frutescens DC. Whitened with a minute silky pubescence, 1.5 to 9 dm. 
high: leaves obovate to spatulate-oblong or lanceolate, often toothed near the base: 
chaff rigidly pointed._Sandy seacoast of Texas. 
64. GYMNOLOMIA HBK. 
Herbs or shrubby plants, with erect branching stems, alternate or 
opposite leaves, heads of yellow flowers on peduncles terminating the 
branches, sterile rays, convex or conical receptacle with chaff either 
strongly concave or conduplicate and embracing the more or less com- 
pressed but not margined short and smooth achenes, the truncate apex 
of which is commonly at length covered by the base of the corolla (the 
tube of which is usually pubescent), and pappus none or a minute den- 
ticulate ring. 
1. G. multiflora Rothrock. Annual, 3 to 9 dm. high, strigulose-pubescent or 
scabrous (sometimes also hispid), often much branched: leaves from narrowly linear 
to lanceolate, either alternate or mainly opposite, entire or obscurely denticulate: 
achenes compressed, with convex or obtusely angulate sides. (Heliomeris multiflora 
Nutt).—Abundant in western Texas. Very polymorphous. 
2. G. tenuifolia Benth. & Hook. Shrubby, much branched, 6 to 9 dm. high, 
scabrous-puberulent, very leafy: branches terminated by solitary long-peduncled 
heads: leaves alternate and the lower opposite, canescent beneath, pinnately or pe- 
dately parted into 3 to 7 narrow linear lobes, or the uppermost narrow and entire, 
the margins mostly revolute: achenes quadrangular-compressed. (Heliomeris tenui- 
folia Gray).—Throughout southern and southwestern Texas. 
65. VIGUIBRA HBK. 
Herbaceous or somewhat lignescent plants, with only the lower or 
rarely all the leaves opposite, yellow-flowered heads on peduncles ter- 
