CATALOGUE. 81 



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



(759), Utah. 



Erodium cicutarium, L. ITer. — Santa Fe, N. Mex. (3G 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, GIG. — 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- 

 Tifolta, 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. Canbyi, 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; tbe broad lobes 

 imbricated iu aestivation. Petals 5, bypogynous, oblong, very obtuse, at base with abroad insertion, im- 

 bricated in activation, with a rather prominent midrib inside, deciduous. Stameus 5, hypogynoos, 

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

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

 luncro; cells inwardly longitudiually dehiscent. Dried pollen becomes 3-horned when moistened. Disk 

 none. Ovary placed on a gynobase (at first thicker thanilself), 5-cellud, tbe thick style at length elongat- 

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

 f cquently 6, subborizontally inserted in two series in the inner angle [amphitropons] ; 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 and later loculicidal), terminated by 10 split portious 

 of the persisting style; columella noue. Seeds 1-2, filling the cell, ascending, subovate, flattened; testa 

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

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

 ish radicle inferior." My own specimens 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. 159-1G0. 



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 ini-ide view of stamen. Fig. 5. An outside view of stamen. 

 Fig. 6. The young fruit ; petals fallen and filaments remainirg. Fig. 7. A veilical section through a 

 youug ovary. Fig. 8. AyouugoMilo. Fi^. 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 brauch maguificd about 

 five diameters. 

 G BOT 



