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PROCEEDINGS OF THE CALIFORNIA ACADEMY OF SCIENCES 
Series 4, Volume 64, No. 7 
in diameter than the petiole and appears as a circular flange around the base of the petiole, and 
remains as a protruding flangelike or shieldlike leaf scar after the leaf has dehisced. This would 
appear to be due to considerable shrinkage of the petiole on drying. 
Justicia zapoteca would appear to pertain to Graham’s (1988) section Sarotheca (Nees) Benth. 
based on characters of the inflorescence, calyx, and seed. Indeed, it superficially looks much like 
the southern Central American species, J. oerstedii Leonard, which differs by having glabrous leaf 
blades, bright red corollas bearing only eglandular trichomes, unappendaged and glabrous anther 
thecae that are equally to subequally inserted and parallel to subsagittate but separated by a con¬ 
nective 0.2-0.6 mm long. Pollen of J. zapoteca (Fig. 4C) conforms to that occurring in several of 
the sections of the genus recognized by Graham (1988), and to the most commonly encountered 
type among Mexican species of the genus (Daniel 1998). 
Louteridium dendropilosum T.F. Daniel, sp. nov. 
Louteridium dendropilosum differs from its congeners by the following combination of char¬ 
acters: epipetric habit, four stamens, and dendritic trichomes on some vegetative and reproductive 
organs. 
Type.— MEXICO. Oaxaca: Distr. Pochutla, Mpio. San Miguel del Puerto, Arroyo Arena, ca. 
100 m downstream from jet. Rio Laja, ca. 3 km SE of Rancho Dioon toward Xadani, 
15°58’51.33”N, 096°05’53.91”W, 600 m, evergreen seasonal forest (selva mediana subperennifo- 
lia), 29-III-2011 (fir, frt), T. Daniel, A. Sanchez, & J. Pascual 11784 (holotype: MEXU!; isotypes: 
CAS!, COLO!, K!, MO!, NY!, SERO!, US!). 
Shrubs to trees to 12 m tall, frequently epipetric, larger individuals with prop trunks/roots. 
Older (woody) stems quadrate, lenticellate, irregularly striate-sulcate, lacking trichomes; younger 
(herbaceous) stems subquadrate-sulcate [terete on fresh stems], sparsely lenticellate, irregularly fis¬ 
sured, [lacking trichomes on fresh stems] evenly pubescent with erect to flexuose simple and den¬ 
dritic (sparse) eglandular trichomes <0.1-0.5 mm long. Leaves deciduous, often ± clustered at apex 
of old growth or at apex of an otherwise leafless shoot of new growth, petiolate, petioles often 
tinged with pink or red, to 60 mm long, blades subsucculent, ovate to elliptic to broadly elliptic, 
76-180 mm long, 40-107 mm wide, 1.4-2.5 x longer than wide, apiculate to acuminate at apex, 
rounded to acute to attenuate at base, adaxial surface pubescent with simple and dendritic eglan¬ 
dular trichomes, trichomes soon becoming ± restricted to proximal portion or to midvein, abaxial 
surface pubescent (especially along veins) with dendritic trichomes to 0.5 mm long, midvein often 
pinkish or reddish, margin entire (sometimes undulate and appearing subcrenate). Inflorescence a 
terminal subsessile to pedunculate dichasiate raceme to 220 mm long, peduncle to 50 mm long, 
pubescent like young stems, rachis pubescent like young stems; dichasia opposite or alternate, ses¬ 
sile, 1-flowered, to 47 mm long. Bracts caducous, not seen. Bracteoles caducous, not seen. Flow¬ 
ers pedicellate, pedicels 21 —46 mm long, pubescent like rachis or with the trichomes to 1 mm long. 
Calyx 17-32 mm long, lobes subhomomorphic to subheteromorphic, membranaceous, subelliptic 
to ovate-elliptic to subrhombic-obovate, rounded to acute at apex, abaxially pubescent with most¬ 
ly dendritic trichomes 0.1-0.5 mm long, posterior lobe planar, 17-32 mm long, 10-19 mm wide, 
usually slightly larger and sometimes more conspicuously venose than lateral lobes, major veins 
often maroon, lateral lobes planar, 20-31 mm long, 8-18 mm wide. Corolla light green or green¬ 
ish yellow, somet im es with maroon on limb (especially at base of lobes) and distal portion of 
throat, externally glabrous (inconspicuously glandular punctate but lacking elongate trichomes), 
50-62 mm long, tube 35-37 mm long, narrow proximal portion of tube 11-15 mm long, 6-10.5 
mm diameter near midpoint, throat 20-24 mm long, 25-35 mm diameter at mouth, lobes recurved 
to recoiled, broadly ovate-sub triangular, 13-20 mm long, 10-21 mm wide, entire at apex. Stamens 
