a. rare–1. [f. L. umbella (cf. above) + -(I)FORM. Cf. F. ombelliforme.] Having the form of an umbel.
1891. Cent. Dict., Umbellate,… umbelliferous,… umbelliform.
1898. H. C. Porter, trans. Strasburger’s Bot., 544. The designation of the whole order as Umbellifloræ has reference to the umbelliform manner of branching displayed in the floral region.
