Callitriche L.
Key
Characters of the family.
The spp. are difficult to discriminate in the dry state, especially in the absence of fr. The prevalence of habitat-modifications increases the difficulty. The N.Z. spp. are being studied by R. Mason, who has given me much help.
Fig. 13. CALLITRICHE. Leaves and fruits. Scale applies only to fruits; leaf-size varies greatly even in one plant. © All rights reserved. [Image: 4X0V]