ROBINSON.— DIAGNOSES ETC. OF SPERMATOPHYTES. 503 
bus, cortice griseo pustulis suberosis fulvis maculato; aculeis infrasti- 
pularibus geminis rigidis patenti-ascendentibus arcuatis cavis 4-6 cm. 
longis basi 5 mm. diametro apicem attenuatam versum cum foramine 
verisimiliter a formicis facto munitis; foliis ca. 2 dm. longis ca. 8 cm. 
latis; petiolo 1 cm. longo subtereti supra canaliculato; pinnae 14-16- 
jugis lineari-oblongis contiguis vel etiam imbricatis falcatis basi 
obliquis apice rotundatis ca. 6 mm. longis 1 mm. latis glabris subtus 
pallidioribus; inflorescentiis globosis usque ad 15 ex eodem axillo; 
pedunculis brevibus 1-2.5 em. solum longis ca. 2-4 mm. supra basin 
cum involucro annulari squamuliformi saepius 3-partito instructis 
nec non. media in parte cum involucello simili munitis; calyce sub- 
cylindrico parum superne ampliato breviter 4-dentato; corolla breviter 
exserta glabra; legumine sessili falcato-lineari ca. 14 cm. longo 6 mm. 
solum lato margine valde incrassato faciebus concavis glabris apice 
basique attenuato.— British Honduras, Prof. Morton E. Peck, no. 632 
(type, in Gray Herb.). Another species of the highly interesting 
ant-inhabited Acacias like A. sphaerocephala Cham. & Schlecht., A. 
spadicigera Cham. & Schlecht., A. Hindsii Benth., ete., but differing 
from all these markedly in the double involucre of the peduncles, as 
well as in the long narrow pod, and various other features. 
SESBANIA VESICARIA (Jacq.) Ell, var. atro-rubra (Nash) S. C. 
Brooks, comb. nov. Glottidium floridanum (Willd.) DC., var. atro- 
rubrum Nash, Bull. Torr. Bot. Club, xxiii. 101 (1896). G@. vesicarium 
atrorubrum (Nash) Small, Fl. S. E. U. S. 615 (1903). 
Aeschynomene tenerrima, spec. nov., herbacea gracilis palustris 
ca. 5 dim. alta ubique glaberrima; caule tereti pallide brunneo deor- 
sum leviter spongiose incrassato supra gracillimo paucirameo, ramis 
ascendentibus subfiliformibus; foliis 2-3.5 em. longis brevissime 
os: Thachi filiformi; foliolis ca. 18-jugis minutis oblongis basi 
obiquis apice rotundatis 22.3 mm. longis 1 mm. latis utrinque pallide . 
alco concoloribus; racemis axillaribus 2-3-floris gracillimis; 
on ad anceolatis subscarioso-brunneis vel -purpureis vix 1 mm. 
mngis ; floribus anthesi ca. 2.8 mm. longis; calyce herbaceo pallide 
viTt é plus minusve bilabiato, fructifero persistenti brunnescenti; 
Petalis Violascentibus ca. 2-2.5 mm. longis; legumine longe (ca. 5 mm.) 
oe stipitato valde ex calice exserto, articulo unico semiorbi- 
. ‘ane longo glabro margine incrassato apice cum styli bast 
Sw. ei curvata appendiculato faciebus leviter reticulato-venosis.— 
amp near Yeaco Lagoon, British Honduras, 15 May, 1907, Prof. 
Dehiaty; E. P eck, no. 900 (type, in Gray Herb.). A very delicate 
ne species with exceedingly small leaflets and inconspicuous 
