stipule

Characterization of stipular colleters of Alseis pickelii.

Shape of inflorescence, thickness of peduncle, venation of leaflet, and apex of floral bract (characters 10, 12, 9, and 13) were most important for determining the component score of the first axis; shape of rachis gland and length of leaflet (characters 3 and 7) were most important for determining the second axis, whereas the most important character for determination of the third axis was symmetry of stipular spine (character 1).

It has zig-zag branches with stout stipular spines.

Vicia sativa enjoys some protection against surface-feeding herbivores from ants visiting its stipular nectaries in both alien (Koptur, 1979) and native (Koptur and Lawton, 1988) habitats.

Mitracarpus bicrucis is enterely glabrous, notable for its stipular sheath with only one lacina and seeds with a cross-shaped furrow on both surfaces.

These have occasionally been interpreted as stipular (e.g., Woodson & Moore, 1938) or staminodial in nature (Lindley, 1853, cited in Lawrence, 1937).

CAUMBELLATUM (Cathormion umbellatum (Vahl) Kostermans), variously transferred to either Albizia or Pithecellobium, has been erroneously described (e.g., Kostermans, 1954) as having stipular spines.