202 Rosaceae 



tube, caudate with the elongated plumose twisted style. 

 Seed linear ; endosperm none. 



1. C. betulaefolius Nutt. A shrub or small tree, 2-5 m. high, 

 with rather thin flaky gray bark and spreading or somewhat 

 recurved branches; leaves thick, obovate, cuneate, entire below 

 the middle, serrate toothed above, sometimes faintly so, distinctly 

 veined on both surfaces, smooth above, pubescent beneath ; calyx 

 open campanulate, 6 mm. broad, the tube becoming 12-14 mm. 

 long in fruit, somewhat contracted above; achene coriaceous, the 

 plumose style about 7 cm. long. 



Rather common in the chaparral belt of all our mountains. Flowering in 

 March and fruiting in July. 



9. ADENOSTOMA H. & A. CHAMISO. 



Unarmed evergreen shrubs with small coriaceous en- 

 tire fascicled stipulate leaves and small white flowers in 

 terminal panicled racemes. Calyx obconic, 5-toothed, 

 10-striate. Petals 5, orbicular. Stamens 10-15, inserted 

 in bundles alternate with the petals. Pistil 1, simple ; 

 style lateral ; ovary 1 -celled, 1 2-ovuled. Achene en- 

 closed by the hardened persistent calyx-tube. 



1. A. fasciculatum H. & A. Shrub 1-4 m. high with reddish 

 virgate branches and grayish bark, becoming shreddy; stipules 

 small, acute, leaves fascicled, linear-subulate, 4-8 mm. long, pun- 

 gently acute, glabrous, often resinous ; flowers crowded, sessile ; 

 calyx bracted at base, green, 2 mm. long, its lobes shorter than 

 the small petals; ovary obliquely truncate. 



Very common in the chaparral belt. April-June. 



10. ALCHEMILLA L. LADY'S MANTLE. 



Ours small annual herbs with leafy stems and minute 

 green flowers in the axils of the palmately lobed leaves. 

 Calyx-tube urceolate, its limb 4-parted with alternat- 

 ing minute bractlets. Petals none. Stamens 1 or 2, 

 minute. Pistils 1 or 2, slender ; style rising from near 



