260 COMPOSITE. (COMPOSITE FAMILY.) 



63. BALDWINIA, Ell. 



Heads many-flowered, globose in fruit ; the ray flowers 20 - 30, neutral, 

 3-toothed at the apex; tube of the disk flowers dilated aud indurated. Scales 

 of the involucre short, fleshy, imbricated in about 4 rows. Receptacle deeply 

 alveolate; the 5-6-aiigled cells witli entire margins, enclosing the slender 

 obcouical hairy acheuia. Pappus of 7 - 9 oblong nerveless chaffy scales, as 

 long as the acheuia. An erect puberulent mostly simple perennial herb, 

 with alternate fleshy entire linear or (the lowest) spatulate leaves, and a 

 solitary head of yellow flowers on a long peduncle. 



1. B. uniflora, Kll. Low pine barrens, Florida to North Carolina, and 

 westward. Sept Stem 2 -3 high. Heads large. Dr. Curtis finds a 

 form with the disk flowers dark purple. The rays are also sometimes tubular. 



64. ACTINOSPERMUM, Kll. 



Scales of the involucre in about 2 rows, lanceolate, setaceously acuminate. 

 Margins of the cells of the receptacle cuspidate-toothed. Acheuia radiate at 

 the summit. Pappus a row of 12 short roundish entire scales. Otherwise 

 like Baldwiuia. A slender branching annual. Leaves alternate, linear, 

 fleshy. Heads of yellow flowers showy, terminating the peduncle-like summit 

 of the branches. 



1. A. angUStifolium, Torr. & Gray. (Baldwinia multiflora, Null.) 

 Dry sandy ridges in the pine barrens, Florida and Georgia. Sept. Stem 

 l-2 high, smooth. Leaves very numerous, sprinkled with jointed hairs. 



65. MARSHALLIA, Schreb. 



Heads many-flowered ; the flowers all tubular and perfect. Corolla pu- 

 bescent, with linear spreading lobes. Scales of the involucre oblong-linear 

 or lanceolate, in 1-2 rows. Chaff of the convex or conical receptacle narrow- 

 linear, rigid. Achenia oblong, narrowed downward, 5 angled, mostly hairy. 

 Pappus of 5 - 6 ovate or triangular acuminate entire membranaceous scales. 

 Perennial herbs, with simple and scape-like or brandling steins, smooth 

 entire 3-nerved alternate leaves, and a solitary head of white or purplish 

 flowers terminating the stem or branches. Anthers blue. 



1. M. latifolia, Pursh. Stem leafy, simple, or sparingly branched 

 above ; leaves ovate-lanceolate, acuminate ; scales of the involucre acute ; 

 achenia smooth. Dry soil, in the upper districts. May -June Stem 

 1 high. 



2. M. lanceolata, Pursh. Stem naked above, simple, pubescent ; leaves 

 lanceolate, obtuse; the lowest spatulate; scales of the involucre obtuse; 

 achenia pubescent. Var. PLATYPH.YLLA, Curtis. Stem leafy to the middle ; 

 leaves longer and broader, the lowest long-petioled. Dry open woods, 

 Florida to North Carolina, and westward ; the variety in the upper districts. 

 April -June. Stem 6'- 12' high. Leaves 2' -3' long. 



3. M. angustifolia, Pursh. Stem simple or branched, lenfy below, 

 puberulent above ; leaves linear, acute, the lowest spatulate ; scales of the 



