THE VEGETATION OF THE SUMMIT OF MOUNT HAMILTON. 83 
been brought accidentally; ONES it is not rare in such 
situations elsewhere. 
27. *Matva PARVIFLORA, Linn. Amoen. Acad. 416. The 
common weedy very small flowered mallow. Observed only 
about the cottages, in depauperate specimens. 
28. STELLARIA NITENS, Nutt.; sod & Gray, Fl. N. Am. 
1. 185. 
29. ARENARIA CatirorNicA, Brewer; Boland. Catal. 6; 
Greene, Fl. Fr. 124. Abundant on sunny slopes near the 
summit. 
30. ARENARIA MACROPHYLLA, Hook. Fl. Bor.-Am. i. 102. 
t. 37. Very plentiful, on rocky slopes above the Aquarius 
Road, in the shade of oak bushes; the ground doubtless very 
moist in Spring, at the flowering season of the plant. This 
was hitherto supposed to belong more exclusively to the 
Coast Range northward, and it has not often been collected. 
Its occurrence on Mount Hamilton, and in such quantity, is 
therefore a significant extension of its known range. 
31. *Rumex orispus, Linn. Sp. Pl. i. 335. Although not 
found on the slopes of the mountain anywhere, and usually 
affecting cultivated lands only, this coarse weed has obtained 
a firm footing on the rocky soil about the Observatory. 
32. *Rumex AceroseLya, Linn. 1. c. (Rep Soret). 
Only one plant seen. 
33. *PoLyGonum AVICULARE, Linn. Sp. Pl. i. 362 (Knor- 
Grass). Not yet prevalent here, but several plants noticed. 
34. Eriogonum sTe~LaTumM, Benth. Trans. Linn. Soe. 
xvii. 409. Very common on sunny slopes looking southward 
and westward near the summit. 
35. Ertoconum Tracuygonum, Torr.; DO. Prodr. xiv. 15. 
Abundant in like situations with the preceding, but begin- 
ning at lower line of elevation. The species has latterly been 
blended, in the books, with the Texano-New-Mexican £. 
Wrightii, which is of different habit and foliage, with a 
