VOL. XII. NO. 3—BOTANICAL GAZETTE.—MARCH., 1887.. 
Delphinium, an attempt to distinguish the North American Species.. 
ASA GRAY, 
This essay at an arrangement of our species of Delphin- 
ium is submitted to the botanists of the United States in the 
hope of eliciting, during the ensuing spring and summer, 
some observations on the living plants and such collections 
of specimens with their roots, fruit, and seed as may either 
confirm or invalidate the characters which I have endeavored 
to turn to account. ‘ 
1. Seed-coat close, smooth: root fasciculate-tuberous. D. TRICORNE, 
2. Seed-coat cellular, more or less loose and rugulose : 
stem scapiform from thickish branching roots. 
Leaves well dissected: raceme many-flowered. D. scaposum. 
Leaves merely 3-cleft: raceme few-flowered. D. ULIGINOSUM. 
8. Seed-coat loose, cellular, becoming transversely ru- 
gose-squamellate : fascicled roots long: stem leafy. D, AZUREUM. 
4. Seeds with loose cellular coat either arilliform or 
when dry merely scarious-margined or winged at 
the angles, not at all squamelliferous: more or less 
leafy-stemmed. 
*Fasciculate roots elongating, not at all tuberiferous. 
* Stem strict, tall or robust, many-leaved: raceme 
many-flowered: pedicels seldom longer than the 
flower or fruit, ascending or erect: follicles erect 
or nearly so, short-oblong. 
h Legale OW | 
