149 
briatis——Repeatedly dichotomous from the annual root, divari- 
cate-diffuse, a sessile and solitary involucrum in each fork; on the 
branchlets the involucres rather crowded and somewhat spicate 
me leaves to bracts. Radical leaves spatulate. The cauline 
are larger, less lobed, more amplexicaul, (and most of 
a really perfoliate,) and the angles or lobes less awn-pointed 
than in Mucronea, Benth.) Californica ; the four triangular 
teeth of the involucre also tipped with a shorter awn, not ex ceed- 
ing the perigonium when that is fully developed ; the divisions of 
the latter, especially the three inner ones, conspicuously fimbri- 
: ate-le iniate. Otherwise this plant closely resembles Bentham’s 
of the genus from Chorizanthe, notwithstanding the peculiarity of 
abit. Centrostegia, with a similar habit, is distinguishable only 
by the spurred appendages of the involucrum, and is probably to 
be reduced, along with Mucronea, to a section of Chorizanthe. 
To this, however, does not belong Remy’s C. commissuralis, which 
differs from true Chorizanthe merely in the laxer inflorescence. 
Acanthogonum, Torr. (which has a short-pedicelled flower and 
nine stamens,) is. an interesting link, plainly connecting Lastar- 
riea, Remy, with the other Eriogoneous genera. The verticil- 
late upper leaves Of the latter answer to the involucre, which, 
however, incloses a proliferous shoot as well as a flower. 
109. Anemonopsis Californica, Nuté. 117. Calochortus venustus, Benth. 
110. te albomarginata, Torr. 118. Juncus xiphioides, E. Meyer. 
stipulacea, Enge 119. Polypogon Monspeliensis, Linn. 
ana cee lobata, Née, ( (Q. Tindeti, 120. Triticum repens, Linn 
Benth.) Foliage only. 21. Elymus dasystachys, Trin. ex 
112. Ephedra pinclmrne — Munro in Pl. Hartw., p. 342 
113. Epipactis America (= forma luxurians, Hartw. No. 
114. Brodizea capitata, ee 
indl. 
2032. 
~145. Calliproa lutea, Lindl. 122. Allosorus andromedzefolius, Kaulf. 
116. Tritelia laxa, Lindl. 
Dr. C. T. Jackson announced that the wax-plant of 
Japan (Rhus succedaneum) had been made to vegetate 
at the forcing houses in Washington ; it grows there vig- : 
orously, and will doubtless prove suitable for the South- 
ern States ney He also stated that the experiment 
