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 OF PLANTS CALLED COMPOSITE. 289

Frutices (America? sequinoctialis,) pubescentes, scabri. Folia opposita, indivisa. Capitula 1 corgmbosa, v. terminalia, v. axillaria. Involucri subovati foliola nervosa, obtusa. Palese receptaculi convexi distinctce, figura et textura fere involucri. Corolla? luteo-purpurece (Swartz), glabra, la- ciniis dinerviis. Achenium subcylindraceum v. obsolete angidatum, glabrwm v. pubescens 9 callo baseos subobliauo. Pappus persistans albus, nitens ; radiis simplici serie subulalis, indivisis, superne denticidatis.

Obs. In Sir Joseph Banks's Herbarium there are two plants very nearly related to Calea, differing from it merely in having a radius of ligular female florets. If this difference be considered sufficient to constitute a genus, it may be named Caleacte. The first of these plants (C. urticifolia), with nearly ovate-acute crenated leaves, found by Houston near Vera Cruz, is Solidago urticcefolia of Miller, by whom it appears to have been cultivated. The second, with deeply lobed or pinnatifid leaves (C. pinnatifidd), was lately sent from Brazil by Mr. Sellow.

The second Linnean species, Calea oppositifolia, has very little affinity to the first. In attending merely to the technical character of Santolina, it might be referred to that genus; but it differs so widely, both in other points of cno structure and in habit, that there can be no question of the propriety of separating it, which may be done by the following character, and under the name of

Isocarpha.

Beceptaculum conicum : paleis distinctis, conformibns : extimis involucrum constituentibus. Flosculi tubulosi, uniformes, hermaphroditi. Anther ce basi mutica?. Stig- mata appendice elongato, hispidulo, acuto. Achenium prismaticum : pappo nullo.

Herbse (America? aequinoctialis). Folia opposita (vel

1 Corolla communis, Linn.

19

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