I9II.] TRELEASE— THE DESERT GROUP XOLIXE.E. 441 



Specimens examined : Tamaulipas. Sierra Xolas, between San 

 Luis Potosi and Tampico (Palmer, 1878-9, — the type of D. qiiad- 

 raiigiilafiDii ) . Aliquihuana ( Xc/soii, 4480, 1898) . Sax Luis Potosi. 

 ^linas de San Rafael {Piirpiis, joOQ, 1910, — a form with small fruit. 

 4X4 mm., with style and wings abbreviated and equal). Hidalgo. 

 Sierra de la Alesa (Rose, Painter & Rose, <)ogj, 1905, — called 

 '■ junquillo "). 



TEXT REFEREXCES. 



^ Bouche, Sitzungsber. Ges. X'aturf. Freunde. Berlin. 1875; 118. — ]Mon- 

 atsschr. Verein Beford. Gartenbau. 23 : 482. 1880. 



" Bray, Bull. Torr. Bot. Club. 30 : 627. /. 6. 1903. — Bull. Univ. Texas. 60 : 

 22-24. 1905- 



^ Bruno. Boll. Soc. Xatural. Xapoli. 19 : 159. 1906. 



* Christy. Xew Commercial Plants and Drugs. 6: 42. 1882. 



^Engler & Prantl. Xatiirl. Pflanzenfam. 2 Teil. 5 Abteil. p. 71. /. 5/. 

 1887. 



'" Hansgirg, Sitzungsber. Bohm. Gesellsch. igoi""*: 31. — Phyllobiologie. 421. 

 1903. 



^ Havard, Bull. Torr. Bot. Club. 23: 43. 1896. — Amer. Journ. Pharm. 68: 

 267. 1896. 



* Hooker, Curtis's Bot. Mag. iii. 14. />/. 5041. 1858. 

 ' Kirkwood, Pop. Sci. Monthly. 75 : 446. 1909. 

 "Klebs, Unters. Bot. Inst. Tubingen, i: 568. /. 13. 1885. 



"Lemaire, 111. Hort. 8. misc. p. 61. 1861. — See also Gard. & For. 9: 94 

 1896. 



^- Lloyd, Plant World. 10: 254-5. /• 5^- IQO"- 



" McClendon, Amer. Xat. 42 : 308. ft. 190S. 



"Newberry. Bull. Torr. Bot. Club. 10: 123-4 1883. 



''Orcutt, Bull. Torr. Bot. Club. 10: 106-7. 1883. 



'^Pirotta, Ann. R. 1st. Bot. Roma. 3: 170. pi. 20, 21. 1888. 



^'Preda, Bull. Soc. Bot. Ital. 1896: 135-141. 



"Reverchon. Bot. Gaz. 11: 213. 216. 1886. 



" Rose, Contr. U. S. Xat. Herb. 5 : 224, 240. pi. j6, $7. 1889. 



^"Solms Laubach, Bot. Zeit. 36: 69. pi. 4. 1878. 



^ Trelease, Pop. Sci. Monthly. 70: 219. 1907. 



■' Went & Blaauw, Proc. Sect. Sci. K. Akad. Amsterdam. 8 : 684 ; Rec. 

 Trav. Bot. Neerland. 2 : 223. pi. 5. 1906. 



""Wooton, Bull. X. Mex. Agr. Exp. Sta. 18: 92. 1896. 



"*Zuccarini, Allgem. Gartenzeit. 6: 303. 1838; Abhandl. Akad. ]Munchen. 

 CI. II. 3 : 224, 228. 1840. 



In addition to those noted in the above papers, histological studies are to 

 be found in De Bary, Vergl. Anat. 636-640. — Cedervall, Anat.-Fys. Unters. — 

 Cerulli-Irelli, Ann. R. 1st. Bot. Roma. 5 : 414. — Falkenberg, Vergleich. Unters. 



PROC. .\MER. PHIL. SOC, I,. 200 CC, PRINTED .\UG. 7, IQIt. 



