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8 FIELDIANA: BOTANY, VOLUME 28
9-12 mm. longae et 4.5-5.5 mm. latae, jugae 3 vel 4 basales sessiles,
alterae adnacae, subintegrae vel levissime lobatae, apice rotundae,
pinnulae in plantis majoribus usque ad 14-jugae, infimae petiolulatae
(2 mm.), usque ad 3.5 cm. longae et 1.2 cm. latae, obtusae, basi sub*
cordatae, pinnatifidae, ala costal! ca. 1 mm. lata, segmentis. sub
apice pinnatifido 6-8-jugis, late oblongis, 5-6 ram. longis, 3.5-4 mm.
lads, rotundis, crenulatis, parenchymate et costulis glabris, epaleaceis;
venae simplices vel in pinnulis majoribus infra medium furcatae;
sori pauci, supramediales, saepe tantura in vena anteriore
basali; indusium nullum; receptaculum mediocre; paraphyses breves.
Type in the U.S. Nat. Herb., no. 1,498,535, collected on summit of
Cerro Duida, Territorio Federal Amazonas, alt. 1650-1800 m., Nov.
26, 1928, G.H.H.Tate 402. Additional collections from the same
locality are Tate 626 and Steyermark 58308, both representing small,
possibly depauperate, forms.
It is somewhat venturesome to describe new species in the vast
genus Alsophila, for many of the species are imperfectly known, but
a search of the literature does not reveal any that seem to be the
same as this, or even closely allied. None of the three collections
are quite alike, each differing in the degree of dissection of the
pinnules, which vary from sessile and subentire to petiolulate and
deeply pinnatifid.
Hemitelia dissimilis Morton, sp. nov.
Caudez 15 cm. altus, dense paleaceus, paleis firrais, brunneis,
concoloribus, lineari-subulatis, 7-9 mm. longis, 1-1.5 mm. latis,
longe attenuatis, basi subtruncata affixis; folia ca. 1.2 m. longa;
stipites ca. 55 cm. longi, 5.5-6 mm. diam., brunnei, inermes, sparse
verrucosi, glabri, fere epaleacei, bisulcati; laminae ovatae, usque
ad 50 cm. latae, basi vix reductae, imparipinnata, rhachi glabra,
epaleacea; pinnae coriaceae, basi articulatae, petiolulatae (1-1.8
cm.), majores 25-27 cm. longae, 7 cm. latae, pinnatae, pinna terminalis
conformis, pinnulis sessilibus, 14-17-jugis basi articulatis,
rhachi angustissime alata, fere glabra, sterilibus oblongis, 3-3.5 cm.
longis, 1-1.4 cm. latis, breviter acuminatis, basi truncatis, margine
remote crenulatis, fertilibus similibus sed leviter sublobatis, omnibus
fere glabris, pilis paucis articulatis et paleis linearibus perpaucis
in costulis dissitis; venae liberae, 10- vel 11-jugae, bis
furcatae, marginem attingentes; sori submarginales, sub apice
venarum omnium; indusia magna, concava, fere 1 mm. lata, brunnea,
firma, persistentia, glabra; receptaculum magnum, globosum; paraphyses
numerosae, piliformes, septatae.
Type in the U.S. Nat. Herb., nos. 1,915,240-2, collected on Ptaritepuf,
south-facing densely forested slopes between Rfo Karuai and
ridge below "Misia Kathy Camp", state of Boh'var, alt. 1250-1520
m., Oct. 27, 1944, Julian A. Steyermark 59442; isotype in herb.
Chi. Nat. Hist. Mus.