Cestrum haberii A.K.Monro

Dataset
GBIF Backbone Taxonomy: Rank
SPECIES: Published in
Monro, A. K. (2012). In: PhytoKeys 8: 65 (-69; Fig. 6).

Classification

kingdom
Plantae: phylum
Tracheophyta: class
Magnoliopsida: order
Solanales: family
Solanaceae: genus
Cestrum: species
Cestrum rugulosum

description

Description. Trees or shrubs, where shrubs occasionally lax, 1 - 5 m. Leaf-bearing stems drying pale brown to dark brown, grey-brown, green-grey or grey, the internodes 7 - 60 x 1.5 - 8.0 mm; young stems glabrous, sparsely pubescent or moderatley pubescent, where pubescent the hairs 0.25 - 0.50 mm, branched, erect, dendritic, eglandular. Axillary buds 0.75 - 2.50 mm, drying pale brown to dark brown or red-brown or dark grey-brown, densely pubescent to regularly pubescent, not subtended by a minor leaf. Lamina 55 - 250 x 19 - 110 mm, length width ratio 1.8 - 3.3 (4.1), ovate-oblong, oblong-obovate, ovate, obovate, or oblong, chartaceous to subcoriaceous, drying olive green, brown or yellow-brown, upper surface glabrous or sparsely pubescent, minutely pusticulate, where pubescent the hairs 0.250 - 0.375 mm, branched or simple, appressed, dendritic where branched, straight where simple; primary and secondary veins clearly visible to the naked eye, the primary and secondary raised; lower surface sparsely to very sparsely pubescent, the hairs 0.25 - 0.50 mm, branched, erect, weakly appressed, dendritic where branched, glandular where simple, dark walled, orange-brown to brown in colour; primary to quarternary veins clearly visible to the naked eye, primary and secondary only or primary to tertiary veins raised, veinlets not visible, secondary veins 6 - 13 pairs, borne 45 - 75 ° to the midrib, curved to weakly curved, strongly ascending; base decurrent or cuneate or asymmetrically obtuse / decurrent or cuneate / decurrent; margin entire, very irregularly and weakly crenate; apex subcuspidate, cuspidate or acute; petioles frequently borne on a crescent shaped short woody spur, 11 - 43 x 0.75 - 2.25 mm, brown to very dark brown, sparsely pubescent or glabrous, where pubescent the hairs 0.125 - 0.50 mm. Inflorescences 3 - 9 per herbarium sheet, axillary and terminal, solitary, borne along the full length of the leaf-bearing stem, 25 - 300 mm, panicle occasionally branched to its base, bearing 7 - 120 flowers in 2 - 25 clusters, each cluster bearing 1 - 8 flowers; sessile or peduculate, where pedunculate the peduncle 2 - 25 x 0.675 - 1.25 mm, brown to dark brown, densely pubescent or moderatley pubescent, the hairs 0.250 - 0.675 mm, branched, dendritic, eglandular; bracts (1.5) 10 - 46 x 1.25 - 14.0 mm, leaf-like; bracteoles 0.5 - 5.0 mm, frequently caducous, linear, moderatley pubescent or densely pubescent. Flowers pedicellate or subsessile, where pedicellate the pedicels 0.375 - 0.750 mm; flowers yellow-green, pale yellow, cream, white or dull pink, the lobes occasionally lilac coloured, nocturnally fragrant; calyx 2.75 - 6.0 x 1.675 - 2.0 mm long, the tube 11 - 21 mm long, the outer surface glabrous, the lobes 3 - 5 (6 - 7), 0.50 - 2.0 mm, erect; corolla 15 - 24 mm, 2.0 - 3.75 mm in diameter at the mouth, 0.5 - 1.5 mm at the base, glabrous, the lobes 5, 2.5 - 4.5 mm; stamens 5, the filaments 13.5 - 19.0 mm long, subequal, adnate for 12.0 - 16.5 mm, with a lobe-like or bilobed appendage present at insertion point, pubescent from appendage to base, anthers 0.675 - 1.250 x 0.675 - 1.0 mm; style 14 - 20 mm, the stigma 0.675 - 0.750 x 0.675 - 1.0 mm. Infructescences 32 - 100 mm long, bearing 3 - 15 fruit; fruiting calyx 3.0 - 4.5 x 4 - 6 mm; fruit 7.5 - 10.0 x 5 - 8 mm, white or cream when ripe. Seeds 7 - 10, 2.5 - 4.5 x 1.5 - 2.0 x 1.5 - 2.0 mm, the surface minutely verrucate.

diagnosis

Diagnosis. Most similar to Cestrum poasanum Donn. Sm. from which it can be distinguished by the broader leaves and the shorter pedunculate or sessile inflorescences bearing flowers with usually shorter pedicels.

discussion

Discussion. Of the 29 known collections of Cestrum haberii most had previously been determined as Cestrum poasanum Donn. Sm. A comparison of the holotype and paratype material with type specimens from the herbaria listed in the Materials and methods section recovered Cestrum haberii as most similar to Cestrum poasanum and Cestrum rugulosum Francey. The two species can be distinguished based on leaf, inflorescence and flower morphology as summarised in Tables 9 & 10.

distribution

Distribution. Wet, cloud and montane forest from (100) 900 to 2200 m. Collection notes indicate that this species is known from undisturbed and disturbed forest. Existing collection localities suggest that the species' Extent of Occurrence is 30,950 km 2 running along the Pacific coast of Costa Rica (Guanacaste, Alajuela, Heredia, Cartago, San Jose, Puntarenas) and Panama (Chiriqui) (Google Earth, accessed Dec 16 2010, images 2001, 2006).

etymology

Etymology. This species is named after William Haber, US botanist (1946 -), who collected the holotype and six of the paratype collections.

Name

Homonyms: Cestrum haberii A.K.Monro

Bibliographic References

Monro A (2012) Eight new species of Cestrum (Solanaceae) from Mesoamerica. PhytoKeys 8: 49-82. doi: 10.3897/phytokeys.8.2238.