222 Rhodora [ DECEMBER 
feet altitude, were found Clematis verticillaris, DC., Arabis hirsuta, 
Scop., * Arabis lyrata, L., *Rosa acicularis, Lindl., Lonicera diotca,L., 
Galium lanceolatum, Torr., * Rhododendron canescens, G. Don, Hydro- 
phyllum virginicum, L., Habenaria Hookeriana, Torr., Carex scirpoidea, 
Michx., and Asplenium Ruta-muraria, L. Higher up on the mountain 
was Allium tricoccum, Ait. In the lower lands we found *Sanicuda 
trifoliata, Bicknell, Aspidium Goldianum, Hook., and in very wet 
ground, beside a brook, Myosotis palustris, With., and Gratiola vir- 
giniana, L., while in a marsh was Scheuchzeria palustris, L. The grass 
of Parnassus, Parnassia caroliniana, Michx., grew everywhere in the 
lower damp regions in great abundance. 
Gray HERBARIUM. 
HONEY-GUIDES OF NIGHT BLOOMERS. 
E. WiLLiams HERVEY. 
A RECENT writer comparing the colors of a diurnal bloomer having 
honey-guides, with a white-flowered nocturnal bloomer having no 
honey-guides, remarks that the latter * has no lines to indicate the 
whereabouts of its nectar, for these would be undistinguishable in the 
dark and therefore useless," implying that nocturnal flowers never have 
honey-guides. In my recently published Observations on the Colors of 
Flowers, I took exception to this statement and cited Convolvulus 
sepium as an example of a flower blooming in the morning twilight, 
To this example should be added Datura Tatula, and /pomea pur- 
purea, the Morning Glory. The former is of a lavender color outside, 
and with only a slight tinge of blue within, appearing nearly white. 
Midway between the top and bottom of the tube, there are fifteen 
deep-purple, longitudinal lines of about an inch in length, viz., three 
to each of the five ribs. The flower in August expands between five 
and six o'clock p.m. and closes early the next morning. 
Ipomea purpurea has white, pink, purple and blue varieties; each 
variety has five stripes or rays running from the border of the limb to 
the commencement of the tube; the rays are always of a color, or at 
least of a shade, different from the flower, a white flower usually having 
pink, and a blue one red-purple rays, etc. A white variety is occasion- 
ally seen without any colored markings. 
All these different varieties of the flower opened at the same time, 
