430 BOTANY. 



9. S. POLYGALOiDES, Gray. Proo. Amer. Acad. 6. 519. Annual "?, paniculately branched; racemes 

 spikelike; calyx yellow, about equaling tie purplish petals, 2-3" long, the outer sepals subcordate- 

 ronnded, the inner oblong-lauoeolate, acuminate; sUiques very narrowly linear, 1-li' long, i" -wide, 

 straight or nearly so, reflexed, pointed with the short style; seeds narrowly margined.— California. 

 "Eather to be distinguished as of a separate section." 



* * More or less bristly or hirsute with simple hairs, 

 (a.) CatiUne leaves or some of them usually aurioulate- or sagittate-clasping and laciniate-toothed ; 

 flowers, at least the calyx, crimson-purple or red. 



10. S. GLANDULOSUS, Hook. Cauline leaves narrowly lanceolate and mostly sagittate-clasping, their 

 sparse teeth with callous rather than with glandular tips ; racemes lax, the pedicels and flowers glab- 

 rous or nearly so ; calyx ovate ; siliques narrowly linear, 2-3' long and less than 1" wide, straight or 

 curved, ascending ; immature seeds slightly margined. — California. 



11. S. HETBEOPHYLl,tJS, Nutt. Annual or biennial, 3-5° high, branching, glabrous at top ; leaves 

 laoiniate-pinuatifid, cauline ones sagittate at the base and clasping ; flowers pendulous, purple ; sepals 

 deep-purple, glabrous, long, connivent ; petals linear, imdulated, purple and whitish ; siliques very long 

 (3-5') and narrow, pendulous on pedicels 4" long; stigma emarginate; seeds slightly margined. — St. 

 Diego, California, (Nuttall.) The plants of Coulter and Xantus, referred here, are Caulanthua Coulteri. 



12. S. HispiDtrs, Gray. Annual, 2-3' high, hispid throughout ; leaves cuueate or obovate-oblong, 

 coarsely toothed or incised, the cauline sessile, hardly at all clasping ; raceme short, loosely flowered ; 

 pedicels spreading or at length recurved; siliques linear, 1^' long, 1" wide, compressed, erect; stigma 

 emarginate, nearly sessile ; seeds winged. — California. 



(J.) Cauline leaves not clasping nor auricnlate at base, entire, the lower sinuate-pinnatifid with 

 glandular teeth and contracted into a margined petiole ; flowers yellow. 



13. S. FLAVESCBNS, Hook. Pilosc ; leaves linear-oblong ; flowers erect ; petals linear, acute ; sepals 

 ovate, obtuse, the petals nearly twice longer; anthers purplish, linear-oblong, filaments free; stigma 

 capitate; siliques erect, hirsute, pointed with the short style. About 1° high, simple, erect; radical 

 leaves nearly 2' long, the cauline scarcely 1' in length. — California. Prof. Brewer's plant, referred to this 

 species, is CaulaniTius procerus. 



Doubtful species. 



14. S. EEPANDTjs, Nutt. "Hirsute, particularly the lower part; leaves oblong-lanceolate, elongated, 

 clasping, angularly toothed or repand above ; flowers white ; petals about as long as the calyx. Stem 

 simple, about 2° high ; pedicels shorter than the calyx ; sepals and petals linear." — St. Barbara, Califor- 

 nia, (Nuttall.) Only known from Nuttall's description. 



SILENEiE. 



In the distribution of the plants in the collection belonging to this tribe of the Caryophyllacem, the 

 usual arrangement of the genera has been observed, as retained by Bentham & Hooker and as on the 

 whole probably the most satisfactory. Dr. Paul Roheback in his Monograph of the Genus Silene, (" Mo- 

 nographie der Gattung Silene;" Leipzig, 1868,) and in his Synopsis of the Lychnidew, {lAnncea, 36, pp. 170- 

 270, 1869,) discusses at some length the relations and characters of the vexed genera of this snbtribe. 

 In his distribution, all of our native North American species fall into his genera Melandryum, Silene and 

 Viscaria, which are distinguished chiefly by the capsule being in the first wholly l-celled, in the second 

 more or less 3-5-celled at base, (both having 3-5 pistils and the capsule dehiscent by twice as many 

 teeth,) while Viscaria differs from Silene (as Lychnis from Melandryum) in having the number of teeth 

 equal to that of the pistils. In his Synopsis, (page 203,) however, he confesses his dissatisfaction with 

 the genus Melandryum as thus defined, admitting that the presence or absence of septa in the capsule is 

 of little value in comparison with other characters, and that possibly it may not be constant even in the 

 same species, and proposes a division, as perhaps the most natural, in which more weight is given to the 

 number of pistils. Under such an arrangement he would limit Lychnis and Viscaria as before, referring 

 to Lychnis and Melandryum only those SpistiUate species in which the capsule dehisces at first septicidaUy, 

 (which excludes all of our species,) rnakiug of the section Gastrolychnis a distinct genus of the same 

 name, and transferring the section Elisanthe back to Silene. 



His present synopsis, as including all our known species but the single new one of this collection, 

 (Lychnis nuda, p. 37,) is here appended, though the arrangement wUl hardly be generally accepted. 



