J Syst Evol ›› 1981, Vol. 19 ›› Issue (2): 168-178.
• Research Articles •
The present paper is devoted to a study of the basic morphological and anatomical
characteristics of the endemic family Rhoipteleaceae from China. The fundamental
pattern of the morphological and anatomical characteristics of the Rhoipteleaceae is
similar to those of the Juglandaceae in wood anatomy, resinous peltate scales, apetaly,
bicarpellate pistils, one-seeded fruits and exalbuminous seeds. Whereas Rhoipteleaceae
has stipules; perfect flowers with superior 2-loculed ovaries, anatropous ovules and two
integuments; vessel elements of the secondary xylem with the scalariform perforation,
and 2–8 (18) pores on the oblique plate being observable; vascular rays heterocellular
and tricolporate pollen. The above characteristics–at least most of them, agree
pretty well with those depicted by Manning in his “Pre-Juglandaceae”. It is quite
possible that the Juglandaceae is derived from “Pre-Juglandaceae”by way of the
Rhoipteleaceae, as the morphological and anatomical features as indicated above tend to
show that the Rhoipteleaceae is more primitive than Juglandaceae.
The Rhoipteleaceae was previously considered as related to the Betulaceae or
Ulmaceae, a view, which the present study does not prove to be acceptable. Both Takhtajan (1969) and Cronquist (1968) pointed out that the Juglandales, Urticales, Myricales, Fagales are all direct derivatives from the Hamamelidales. However, since the
Rhoipteleaceae is simillar to the Betulaceae in wood anatomy and pollen, it seems that
there too could have certain relationships between the Rhoipteleaceae and the Betula-ceae in the course of evolution.
Chang Chin-Yu. Morphology of the family Rhoipteleaceae in relation to its systematic position. J Syst Evol, 1981, 19 (2): 168-178.
Add to citation manager EndNote|Reference Manager|ProCite|BibTeX|RefWorks