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Series 4, Volume 65, 28 Sept. 2018, No. 2 
5 (to 35 or to 90 at proximal nodes) mm long, viscid. Bracts foliose to subfoliose and often per¬ 
sistent proximally, reduced in size and caducous (usually only scars present) distally, proximalmost 
pair sessile to subsessile, lanceolate to cordate, similar to leaves except smaller (e.g., 45 x 32 mm), 
distal pairs ovate to lanceolate, 10-22 mm long, 2.5-9 mm wide, abaxially pubescent like leaves 
(i.e., trichomes mostly eglandular). Bracteoles and secondary bracteoles usually present on young 
inflorescences but becoming deciduous as inflorescence matures, linear to lanceolate, 3.5-13 mm 
long, 1-3.4 mm wide, abaxially pubescent like bracts or viscid. Flowers pedicellate, pedicels to 105 
mm long, viscid with trichomes mostly glandular. Calyx 22-35 (—40 in fruit) mm long, lobes fused 
at base for 1-3 mm, heteromorphic, membranaceous, abaxially viscid where exposed in bud, 
posterior lobe conduplicate, ovate, 21-37 mm long, equaling to longer than lateral lobes, 8-15 mm 
wide, acuminate to subfalcate at apex, lateral lobes lunate, 17-33 (-37) mm long, 6-10.5 mm wide, 
acute to subacuminate at apex. Corolla cream to green-yellow with maroon veins to pale maroon, 
41-57 mm long, externally viscid or pubescent (sometimes sparsely so) with erect to flexuose glan¬ 
dular trichomes 0.05-0.3 mm long, tube 25-34 mm long, narrow proximal portion 8-14 mm long, 
5.7-9 mm in diameter near midpoint, throat 15-24 mm long, 25-38 mm in diameter at mouth, 
lobes recoiled, broadly ovate to subtriangular, 16-20 mm long, 13-15 mm wide, acute or emar- 
ginate at apex. Stamens 2, 65-85 mm long, filaments glabrous distally, pubescent proximally with 
eglandular trichomes, thecae 10-15 mm long; staminodes 2, 0.5 mm long. Style 76-85 mm long, 
glabrous (or with a few glandular trichomes near base), stigma subequally to unequally 2-lobed and 
often ± funnelform, lobes broadly elliptic to obovate to 3-pronged, 1-2.2 mm long, 0.7-2.1 mm 
wide. Capsule 21-31 mm long, 5-8 mm in diameter, pubescent with erect glandular trichomes 
0.1-0.8 mm long, stipe 1.5-2.5 mm long. Seeds 12-16 per capsule, 4.5-5.5 mm long, 4-5 mm 
wide, surfaces minutely papillose in longitudinal rows. 
Phenology. — Flowering: November-June; fruiting: December-June. Brewer et al. 5748 
notes corollas opening at night, just after dark. Davidse & Brant 32089 and Gregory 612 note 
corollas opening at dusk or in the evening and withering by sunrise. Daniel (2010) noted floral 
color forms with different flowering times (see below). Fredy Archila (in litt. January 2012) 
observed both bats and moths visiting flowers of L. donnell-smithii in and around Coban, 
Guatemala over a period of years. 
Distribution and habitat. — Southern Mexico (Chiapas), Belize, Guatemala, Honduras 
(Fig. 10); plants occur, usually on limestone (often karstic), on slopes and along streams in low¬ 
land moist to wet forests, mesophytic montane forests, montane rain forests, and cloud forests at 
elevations from 1 to 1600 (to 2100) meters. 
Illustrations. — Figures 13,4C, D; Lindau (1895:294, fig. 118); Gibson (1974:407, fig. 90). 
Local names. — “Carreton” {Lentz et al. 2428), “matacucuyuchi” {Miranda 7163); “oxox ce” 
{Williams & Wilson 40437 and Wilson 40943, Quecchi name); “palpalte” {Ochoa 80); “tabaco 
silvestre” {Contreras 5510); “vejiga” {Standley 91236); “ulul k’uum” {Ventur 177). 
Uses.— Williams & Wilson 40437 notes that the young growth is eaten; Ochoa 80 indicates 
that “esta planta es comida por el jabali.” 
Conservation. — Louteridium donnell-smithii is the most commonly collected species of the 
genus, and it is also infrequently cultivated in botanical gardens. Its EOO (32,499 km 2 ) encom¬ 
passes all or parts of at least 40 protected areas (10 in Belize, 19 in Guatemala, 9 in Honduras, two 
in Mexico). Collections of the species have been made in 13 of these areas. The species has been 
abundantly collected in most portions of its EOO, and in some regions it was sometimes noted on 
collection labels or observed (TFD) to be common. Fredy Archila of Coban, Guatemala indicates 
(in litt. Jan 2012) that in the vicinity of Coban there were hundreds of trees of L. donnell-smithii in 
