Pineland golden trumpet

Echites berteroi A. de Candolle in A. P. de Candolle and A. L. P. P. de Candolle, Prodr. 8: 447. 1844 (as berterii); Rhabdadenia corallicola Small; R. sagrae Müller Argoviensis

Subshrubs, 10–20 dm. Stems sparsely pubescent. Leaves: pet­iole 1–2 mm, pubescent; blade narrowly elliptic to ovate or oblong, 10–25 × 2.5–10 mm, membranous to subcoriaceous, base rounded to truncate, margins revolute, apex rounded to obtuse, surfaces glabrous. Peduncles 15–20 mm, glabrous. Pedicels 7–10 mm, glabrous. Flowers: calyx lobes broadly ovate, 1–2.5 mm, glabrous; corolla glabrous abaxially, usually eglandular-pubescent adaxially, tube 5–8 × 2 mm, throat 10–15 × 5–9 mm, lobes ascending, obliquely obovate, 7–13 × 6–10 mm, adjacent lobes overlapping for 1/2+ of their length from base. Follicles 60–90 × 1.5–4 mm. Seeds 4–8 mm.

Flowering spring–summer; fruiting spring–fall. Pine rocklands, rockland hammocks, marl prairies; 0–10 m; Fla.; West Indies (Bahamas, Cuba, Hispaniola).

Angadenia berteroi is known from Florida only by collections from Miami-Dade and Monroe counties. It is considered threatened in Florida.

B. Barrios and S. Koptur (2011) examined the breed­ing system of Angadenia berteroi and concluded that the low fruit set seen in natural populations may be due to a combination of self-incompatibility and low visita­tion by pollinators. Within the pine rocklands hab­itat dominated by Pinus elliottii, the abundance (but not flowering or fruit set) of A. berteroi has been shown to be correlated with habitat fragmentation and time elapsed since burning (Barrios et al. 2011).

G. E. Burrows and R. J. Tyrl (2013) reported that the milky latex of Angadenia berteroi causes irritation and reddening of the skin upon contact and increased mucus production by the mucosa of the digestive tract upon ingestion.