"Herbs with long trailing branches; stem reddish, tomentose. Leaves unequal, ovate, obtuse, undulate along margins, truncate to subcordate at base, tomentose; petiole to 1 cm long. Flowers 4 mm long, 4-10 together, in axillary or terminal, peduncled umbels; bracts 5, ovate, glandular, perianth pink, stamens 3, capsule 3 x 1 mm, clavate, 5-ribbed, glandular."
Comments: Kartesz (1994) and Fosberg (1990, in Wagner et al. 1990) recognize Boerhavia glabrata Blume as a species that, within the U.S. and Canada, is present only in Hawaii (where native); Fosberg (1990) notes that it is also "widespread in the southern and western Pacific." Kartesz (1994) also recognizes Boerhavia diffusa L. as a species distinct from B. glabrata; this B. diffusa is present in several southeastern U.S. states as well as the Caribbean (Puerto Rico, U.S. Virgin Islands, Jamaica). Kartesz (1996 unpublished distribution data) regards this B. diffusa as falsely reported from Hawaii, and Fosberg (1990) appears to hold a similar opinion, listing "B. diffusa sensu auct., non L." as a synonym of their B. glabrata. Fosberg (1990) elaborates further on the taxonomic view at that time: "This species, usually referred to as Boerhavia diffusa, B. repens, or B. acutifolia, is a member of the Boerhavia repens group (Fosberg 1978), and clearly connects B. herbsii with this group. The name B. glabrata has not previously been used for oceanic Pacific plants, called B. acutifolia, or included in B. diffusa or B. repens. Boerhavia glabrata and B. acutifolia seem to be the same, but the types have not been compared. Both were originally described from Java, with very brief and inadequate descriptions; B. glabrata has priority."
In the 1999 Supplement to the Manual of the Flowering Plants of Hawaii (Wagner and Herbst 1999), Boerhavia acutifolia (Choisy) J.W. Moore is listed as the accepted name of this taxon, with reason "taxonomic change for B. glabrata" and comment "Boerhavia glabrata is not the species treated as B. acutifolia prior to Fosberg's 1990 treatment (F.R. Fosberg, pers. comm. 1990)." So apparently, Fosberg revised his hypothesis that the names B. glabrata and B. acutifolia referred to the same material soon after the 1990 publication of the Manual and went back to the traditional Boerhavia acutifolia as the accepted name for Hawaiian plants. Boerhavia acutifolia currently appears to be widely accepted as the correct name for Hawaiian plants, with some recent manuscripts listing B. glabrata Blume [misapplied] as a synonym for it.
As an aside, Kartesz (1999) lumps Boerhavia glabrata into a broader-sense Boerhavia diffusa (so his Boerhavia diffusa includes both Hawaiian/Pacific and southeastern U.S./Caribbean plants); Kartesz (1994 and 1999) makes no mention of the name Boerhavia acutifolia.