Mohave Desert, New York Mts. Barnwell
c. 4000 ft.
there must be some reason for such analogies and that they cannot be mere coincidences. Doubtless the causes are buried in the remote past and locked up with conditions long since past and at which we can only guess. Perhaps there were sets of conditions which succeeded each other, making bilabiate flowers on a large scale, papilionaceous flowers, composite flowers, pink-type flowers and so on, and that a few or many of each type persisted. Profiferous growth such as occurs in Composite no. 5474 or in Oenothera no. [blank space] or in Gilia, is
10 May 1913.
explained by a common set of conditions.
No. 5464. Erigeron concinnus var. eremicus Jepson n. [?] var. [E. pumilus Nutt. ssp. concinnoides Cronq.]
No. 5465. Hoffmannseggia densiflora Bth. Leguminous. [Prostrate perennial.]
No. 5466. [Hilaria rigida (Thurb.) Benth. (det. Beecher Crampton, Jan. 1973)] Grass. Pleuraphis rigida Thurb.
No. 5467 Menodora spinescens Gray. Corolla 3 to 3 1/2 lines long. Stamens 2. Style one, entire. Cor. lobes roundish. Shrub 2 ft. h. See p. 86.
No. 5468. Grass Bromus rubens L.
No. 5469. Comp. Heads close until about 8 o'clock!!
No. 5470. Senecio [multilobatus T. & G.] Comp. One plant here and another 1/8 mile on, etc