126 THE FLORA OF THE ALPS 
A. Clematitis, L., Birthwort; flowers in clusters of 
4-6, yellow, leaves cordate, apiculate, stem erect, not 
twining; waste places and vineyards; Switzerland, 
Dauphiny, Pyrenees, rare. <A. rotunda, L.; flowers soli- 
tary, elongated ; leaves cordate, obtuse ; Ticino, Dauphiny, 
Pyrenees, rare. 
2. ASARUM, L. 
Flowers bisexual, solitary; calyx lurid purple, cam- 
panulate, 3-lobed; stamens 12; ovary partially inferior, 
6-celled ; styles 6; leaves all radical. 
A. europeum, L., Asarabacca; flowers large (4 in.), 
on short woolly leafless scapes, leaves reniform-orbi- 
cular, on long stalks; woods and thickets, rare; Switzer- 
land, Jura, Vosges, Puy-de-Déme, Pyrenees. 
Order LXXX.—CERATOPHYLLACE. 
Flowers solitary, axillary, minute, moncecious; calyx 
O; stamens numerous; ovary I-celled, 1-ovuled; leaves 
in whorls, sessile, divided into capillary segments. Sub- 
merged aquatic herbs. A very small order, consisting of 
the single genus 
I. CERATOPHYLLUM, L. 
Characters of the order. 
C. demersum, L. (including submersum, L.), Hornwort ; 
stagnant water in the lowlands; not common. 
Order LXXXI.—CUPULIFER. 
Trees or shrubs with alternate stipulate leaves; flowers 
unisexual, monoecious; male flowers in catkins, female 
