CHORIZANTHE. 63 



inches high, sparsely pubescent, usually branching from the base ; radi- 

 cal and lower leaves narrowly lanceolate, with slender petioles, obtuse 

 or acuminate, pubescent with appressed hairs; small foliaceous whorls 

 at the lower axils, upper bracts setaceous uncinate; involucres loosely 

 scattered on the slender branches, tube cylindric, somewhat protuber- 

 ant below, and curved at the base, inconspicuously costate, divisions 

 5-6, short, slightly unequal, recurved and uncinate ; flowers short pedi- 

 celled, included ; perianth narrowly obconic, segments equal, short lin- 

 ear ; stamens 3 at the base ; styles as long as the ovary, akene very 

 narrowly triangular ; embryo with slender cotyledons and radicle. 



Habitat: Eastern desert districts of Southern California, extending 

 into Arizona and Southern Utah. Very slender and fragile at the joints. 

 Difiiicult to examine satisfactorily, on account of its reduced characters. 



29. C. La.starri^a (Z*?^^?;-/-/^?^ Chilensis), Remy., Watson, 1. c. (and 

 other systematic authors). Decumbent or ascending, 3-6 inches high, 

 densely branched from the base, hispid-pubescent ; radical leaves linear, 

 obtuse, unequal, hispid-ciliate ; cauline and involucral bracts, forming 

 regular whorls of 4 to 5 unequal parts, sessile, and closely embracing 

 the stem with prominent mid-nerve, prolonged above into an uncinate 

 awn ; involucres (perianth of anthers) mostly concealed in the axils of 

 the whorled bracts, scattered along the short jointed stem, tube trian- 

 gular, chartaceous ; divisions 5, three longer and two intermediate, all 

 recurved, with short uncinate awns ; perianth obsolete, or reduced to an 

 obscure lobed ring at the throat of the involucre, apparently adnate 

 below ; stamens 3, with short filaments, inserted on the throat, anthers 

 small, orbicular, deciduous ; styles short, recurved, akene oblong tri- 

 angular ; embryo with oblong linear cotyledons, longer than the straight 

 radicle. 



Habitat: Abundant throughout Southern California, and in the San 

 Joaquin valley, to Antioch, also in Chili, South America, probably na- 

 tive to both, Closely related to C. brevicornii, and naturally closing 

 up the Euchorizanthe section. (See preliminary remarks above.) 



Davenport, Iowa, February 25th, 1884. 



Note.— -On receiving, recently, from Mr. C. R. Orcutt, more complete speci- 

 mens of E. Orciittiaiia, I find occasionally t'u>o unequally developed flowers in some 

 of the larger involucres; so that the character of the Section Chorizant/tella, on 

 page 53, should be modified to "Ifivolitcres 1—2 flowered," and the same also in- 

 serted in the specific description, page 54. This significant fact still further con- 

 firms the necessity of a separate section, to jncTucle this well-marked group. 



