CATALOGUE. 81 



Some forms resemble G. Fremontii closely, South Park, Colorado, 



(759), Utah. 



Erodium cicutarium, L. Pier.— Santa Pe", N. Mex. (36 a.) 



Oxalis violacea, L. — Mount Graham, Arizona, at an altitude of 9,250 



feet. (437 ) 



RUTACE^E. 



Canotia* holocantha, Torr. (in Pacific R. R. Rep. iv, 68). Benth. 

 and Hook. 1, 616.— A much branched, leafless tree, 20° high and trunk 1° 

 in diameter; branchlets yellowish-green, delicately striate ; sparingly dotted 

 with very minute brown scales, which represent reduced leaves ; flowers 

 white or yellowish white; pedicels articulated; bracts small and scale-like; 

 minute cil-glands sparingly seen on the bracts, sepals, and petals. Gila Val- 

 ley, Arizona, (323.) Plate I. f 



From Camp Bowie, Arizona, I have (499) a Ptelea, probably angus- 

 tifolia, Benth. 



CELASTRINE^E. 



Pachystima Myrsinites, Raf.— Utah, 5,000 to 7,000 feet altitude. Quite 

 recently, the indefatigable Mr. Canby has brought to light a second species 

 of this genus (P. Canfoji, Gray), in Giles County, Virginia. "While the 

 original P. Myrsinites occurs plentifully in most wooded districts from the 



•Canotia, Torr.— " Flowers hermaphrodite. Calyx small, 5-lobed, persistent; the broad lobes 

 imbricated in aestivation. Petals 5, hypogynous, oblong, very obtuse, at base with a broad insertion, im- 

 bricated in activation, with a rather prominent midrib inside, deciduous. Stamens 5, hypogynous, 

 opposite to the calyx lobes : filaments subulate, somewhat shorter than the petals, persistent : anthers 

 oblong-cordate, introrse, affixed to the filaments in the acute apex of a deep sinus, apiculate with a small 

 mucro; cells inwardly longitudinally dehiscent, Dried pollen becomes 3-horned when moistened. Disk 

 none. Ovary placed on a gynobase {at first thicker than itself ), 5-celled, the thick style at length elongat- 

 ing: stigma small, slightly 5-lobed; cells of the ovary opposite to the petals. Ovules in the cells most 

 frequently 6, subhorizontally inserted in two series in the inner angle [amphitropoiis] ; micropyle infe- 

 rior. Capsule ovate-fusiform, somewhat woody, covered with a delicate, somewhat fleshy epicarp, 

 5-celled, 10-valved at the apex (at first septicidal aud later loculicidal), terminated by 10 split portions 

 of the persisting style; columella none. Seeds 1-2, filling tho cell, ascending, subovato, flattened ; testa 

 subcoriaceous, thickly papillulose, produced below into a broad membranous wing somewhat longer 

 than the nucleus. Embryo straight, in a thin layer of fleshy albumen ; cotyledons oval, flat ; the short- 

 ish radicle inferior." My own specimeno showing only the flowers and immature fruit, I have been 

 obliged to quote the above from Dr. Gray's complete description, recently published in Proc. Amer. Acad, 

 xii, pp. 159-160. 



t Branch ; natural size. Fig. 1. A cross section of a flower. Fig. 2. An open flower. Fig. 3. A 

 longitudinal section of flower. Fig. 4. An inside view of stamen. Fig. 5. An outside view of stamen. 

 Fig. G. The young fruit; petals fallen and filaments remaining. Fig. 7. A vertical section through a 

 young ovary. Fig. 8. A young ovule. Fig. 9. A vertical section of mature fruit. Fig. 10. A cross section 

 of fruit. Fig. 11. A seed. Fig. 12. A diagonal section of a seed. All except the branch maguified about 

 five diameters. 



G BOT 



