Waltheria pyrolifolia

A.Gray (1854)

This name is accepted

Kingdom: Viridiplantae Phylum: Magnoliophyta Class/Clade: Eudicot-Rosids Order: Malvales Family: Malvaceae Genus: Waltheria

Description

Key Characters:

Growth Form: Woody shrub.

Stems:

Roots:

Leaves: Leaves simple. Alternate. Leaves widely obovate to widely depressed obovate, widely elliptic to oblate, widely ovate circular, very widely ovate to widely depressed ovate, length/width ratios 1.2-0.8:1. Apex commonly retuse, sometimes rounded. Leaves when yet unfolded adaxially subglabrous, with minute glandular hairs throughout, pubescent and tomentose over teeth, and puberulent here and there on surface, pubescent from a few teeth apices, tufted on midvein and some secondary veins. Margins crenate-dentate. Stipules narrowly triangular.

Flowers: Flowers ca. 8 mm diam., presumably distylous, pin-like Calyx lobes contiguous and without sinuses while in bud, later lanceolate, broadly linear, silky short villulose. Petals of unknown color fresh, dark castaneous dried, pale-pustulate, thickened, obovate, slightly cucullate, concave, 1.5-1.7 mm wide; petal base adnate to stamen tube base for 0.2 mm and 0.3-0.5 mm wide; nerves thick, eight from base to apex, basally contiguous where 0.3-0.4 mm wide. Stamens of uneven lengths within flower. Connate only at the base, Tube short, 0.2-1.0 mm, segmenting in age, Free filaments long, 0.9-3.6 mm long. Ovary superior, pistil 4-5 mm long, superseding stamens by 0.7-1.7 mm; stigma nearly simple, 0.1-0.2 x 0.1-0.4 mm, denticulate or scant papillose; style excentric, 2.6-3.8 x 0.1 mm, arachnoid-villous.

Fruit: Capsules utricle-like but loculicidal; partially dehiscent ventrally at apex and dorsally at apex; retaining seed; endocarp coriaceous; only near suture slightly sclerified. Obovoid in lateral view; 3.2-4.0 mm long. Seeds obovoid in lateral view; 2.4-2.7 mm long; in apical view 2-lobulate near raphe; seed cover thick; striate-fibrous.

Ploidy:

Habitat: Sand hills consists of calcareous lithified dunes; used for grazing.

Elevation Range:

Historical Distribution

Uses and Culture

USES

Natural History

Statewide Status

Endemic

Island Status

Maui Endemic

Dispersal Agents


Pollinators

Bibliography

Name Published In: U.S. Expl. Exped., Phan. 1: 190 (1854)

Other References

Wagner et al. 1990:1280 (Syn. W. pyrolaefolia = W. indica); Saunders 2011:79 (RESURRECT/EXTINCT/WM†, [known only from type, 1841] KEY, DESCR, spelling change to pyrolifolia); Wagner et al. 2012:71 (Syn. W. pyrolifolia = W. indica, not followed)

Occurrences

SNo. Scientific Name Scientific Name Authorship Locality Habitat Basis of Record Recorded By Record Number Island Source Date