AcTiNOLEPis. COMPOSITiE. 377 



stem, and somewhat glomerate at the extremity of the branches ; the bracts 

 (1-2) similar to the leaves. Flowers of the disk and ray yellow. Anthers 

 nearly while. Achenia black. 



A. multicaulis (DC. ! 1. c.) — Hook. SfArn..' hot. Beechey, suj)pl. p. 353. 



California, Z)o7io7as/ — Our description differs considerably from that of 

 De Candolle, who perhaps examined an imperfect specimen. He describes 

 the disk-flowers as probably sterile with the style undivided, and does not 

 notice the involution of the involucral scales so as nearly to enclose the ray- 

 achenia, as in the Madiese ; but we find the disk-flowers (perhaps every 

 one) fertile. 



121. LASTHENIA. Cass. ; DC. in Lindl. hot. reg. t. 1780, S^-prodr. I. c. 



Heads many-flowered ; the ray-flowers 5-15, pistillate, ligulate, obliquely 

 truncate and included, or oblong and exserted ; those of the disk tubular, 

 perfect. Involucre as long as the disk, campanulate, composed of 5-15 scales 

 united nearly to the summit; the teeth triangular, acute, ciliate. Receptacle 

 conical, papillose. Corolla of the disk with a slender glandular-pubescent 

 tube, and a campanulate 5-toothed limb. Branches of the style in the disk- 

 flowers terminated by a short cone. Achenia linear-oblong, compressed, 

 appressed-pubescent or glabrous. Pappus of about 10 unequal acute lace- 

 rate-toothed chaffy scales, or none ! — Annual diffusely branched (Chilian and 

 Californian) herbs, growing in wet places ; with opposite linear or lanceolate 

 mostly entire leaves, somewhat connate at the base. Heads solitary, termi- 

 nating the branches ; the elongated peduncles more or less dilated and obconi- 

 cal at the base of the involucre. Flowers yellow : the anthers yellowish. 



§ 1. Pappus of 9 or 10 {rarely 5?) unequal chaffy scales: rays very short, in- 

 cluded. — Lasthenia, Cass. (Rancagua, Poepp. Sf Endl.) 



1. L. glaberrima (DC): involucre about 15-toothed; pappus as long as 

 the disk-corolla, and nearly equalling the obliquely truncate included rays; 

 the scales lanceolate or oblong, the larger ones cuspidate; plant glabrous 

 throughout. — DC. ! prodr. 5. p. 664 ; Hook. S^' Am. hot. Beechey, I. c. 

 L. Californica, DC. ined., not of Lindl. 



California, Douglas ! — Plant slender, 6-12 inches high. Leaves 2-3 

 inches long, 1-2 lines wide. Corolla much shorter than the achenia. 

 (Scales of the pappus 5, according to De Candolle.) 



§ 2. Pappus none: rays exserted, conspicuous. — Hologymne, Bartl. (Las- 

 thenia, Lindl., Endl.) 



2. L. glahrata (Lindl.) : involucre 10-15-toothed ; peduncles and young 

 leaves slightly and minutely pubescent. — Lindl. ! hoi. reg. t. 1780 ; 

 DC! I. c. ; Nutt.! in trans. Amcr. pliil. sac. I. c. L. Califcrnica, Lindl. hot. 

 reg. I. c. (note) <y t. 1823 ; but not the plant to wliich this name was original- 

 ly applied by De Candolle. Hologymne glabrata, Bartl. ind. sent. Gait. 

 1837 (1^1839, l^'in Linncea, 12. suppl. p. 81 ; Hook. &f Am. hot. Beechey, 



VOL. II. — 48 



