18 BOTANICAL GAZETTE [JANUARY 
lobes. A distinctive feature in this species is the presence of 
glands at each bifurcation of the panicled inflorescence,  laree 
counterparts of the involucral glands. 
Dr. Palmer’s 618 Durango specimens differ from the type in 
their somewhat larger appendages, longer and more hairy 
petioles, and more robust habit. | 
Chamesyce. z 
E. SERPENS Kth. H. B. & K. Nov. Gen. et Sp. 2:41. 
Dr. Palmer’s 42 Durango specimens of this species are very 
close to var. radicans, but the appendages are plainly to be seen. 
The stipules are interesting, those of the extremities of the 
branches being roseate and longer than the floral leaves, those 
of the lower leaves being subtended by a small peltate-stipitate 
gland or pair of glands, a feature also present in Pringle’s 3778 
from San Louis Potosi, 1891. Dr. Palmer also returns from 
Durango (819) a small rosulate-prostate form with minute leaves, 
and a general roseate color. : 
EUPHORBIA SERPENS RADICANS (Moric.) Engelm. DC. Prod. — 
I5 : 30. 
In £. serpens and its forms the fifth gland of the involucre is 
replaced by a truncate serrate lanceolate lobe. The venation of 
the involucre through- 
out the Chamesyce is — 
interesting, as by its 
size and maze - like 
character it plainly 
shows this body to be 
evolved from the leaf, — 
where this venation is 
continued in an anas- 
tomosing network of 
the same elemental 
type. The seeds are — 
pink, somewhat pyriform, 0.8™™ long, 0.5™" broad, triangular 
with a convex ventral surface, and sharp dorsal angle. 
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