PuaTeE 2767. 
ERYNGIUM MEDIUM, JH/emsi. 
UMBELLIFER. 
E. &s conaateel medium, pean (sp. nov.) ; species ex attinitate 
et £. serratt, a priore involucri bracteis fere semper 
dictate pall Soa earn a placed involucri bracteis flores 
exce iselistius distincta 
Herba glabra, erecta, circiter sesquipedalis, caulibus gracilibus 
preeter inflorescentiam simplicibus. Folia radicalia fere linearia, 
3-8 poll. longa, spinoso-lobulata, sone Jobulos usque ad 3 lin. lata, 
tte obuli e ati 2-3 lin. i 
latim pauciramosa, ramulis pedunculisque gracillimis, capitulis seepius 
ternis. IJnvolucri Bacio circiter 8, rigide, anguste lanceolate, 
4-6 lin. longz, spinoso-acuminate, szpissime integre sed interdum 
unilateraliter 1-dentate. Capitula subglobosa, 2-3 lin. diametro, 
haud comosa. alee lanceolato-subulate, flores paullo excedentes. 
Flores minuti, vix 5 lin. diametro. Calycis dentes oblongo-ovati, apicu- 
lati. Petala apice: integra. Carpella immatura tantum visa, pauci- 
squamosa, squamis uniformibus. 
Mexico: near San Julian, Chihuahua, at 7000 to 8000 feet, 
E. W. Nelson, 4929. 
have seen only one specimen of this species, which in foliage 
res ome forms of #. serratum, Cav. For a proposed rough 
classification the Mexican and Central American species of 
Eryngium, see the letterpress to plate 2765.—W. Boriinc HemsLey. 
Fig. 1, a pale; 2, a flower; 3, a mericarp; 4, a petal, A enlarged. 
