36 davenport academy of naturat, sciences. 



Section 5. Micrococcus. 



Fruit with thin pericarp, without mealy pulp, wrinkled at maturity 5 

 four or five nutlets easily separating — in two divisions. 



♦Pericarp fruy^ile, nutluts (usuully fouri iK'Coiniriic loose ;irul deciduous at uv.ituritv; one-celled 

 and fertile. 



9. A. numiilaria, Gray. This well-marked Pacific coast species, 

 the fruit of which has been long a desideratum, and which, as Dr. Gray 

 anticipated, would, when known, require its removal to a different sec- 

 tion of the genus, has at last been brought to light from a specimen 

 kindly supplied by Dr. C. L. Anderson, of Santa Cruz, so that I am 

 now able to complete the account of this species. Character extended. 

 Corolla ovate-globose, shortly urceolate, four-lobed (rarely five), smooth 

 externally, white with pinkish tips, slightly hispid within ; calyx usually 

 four-parted, sepals broad oval, hyaline, with finely-ciliate margins; 

 stamens eight or ten, with deep red anthers, filaments smooth, except a 

 few scattering ciliate hairs on the expanded lower portion ; style as long 

 as the flower; ovary densely bearded; fruit oblong, two lines long, one 

 line broad, and covered with a thin, fragile pericarp, which at maturity 

 falls off, leaving the four naked nutlets, which soon become separate 

 and deciduous from the persistent calyx; nutlets usually four, barely 

 two lines in length, carinate, and with conspicuous cross-veins; puta- 

 men thin, with comparatively large seed. 



** Pericarp persistent, nutlets two-celled. 



10. A. oppositifoUa. Shrub three to ten feet high, densely branched 

 above, more or less naked below; stems one to three inches in diame- 

 ter, with light greenish or gray bark, smooth or with loose, shreddy 

 fibers on the upper branches, young shoots minutely tomentose ; leaves 

 opposite or ternately whorled, narrowly lanceolate, entire, revolute, one 

 to two inches long, two to three lines wide, light green above, minutely 

 tomentose beneath, with a prominent mid-nerve, the narrow blade grad- 

 ually tapering to a short or obsolete petiole. Inflorescence paniculate, 

 the lower floral branches in the axils of the upper opposite leaves, 

 which higher up pass gradually into deltoid, more or less accuminate 

 bracts, disposed in whorls of three or less at regular intervals, each 

 bract subtending a branch or pedicel, and decurrent as a ridge down 

 the rachis; pedicels three or four times longer than the bract, bibract- 

 eolate close to the base; corolla orbicular, two to two and one-half 

 lines high, shortly urceolate, with broad, reflexed lobes ; stamens ten, 

 anthers comparatively large, as long as the appendages, filaments short, 



