12 mm. longus. Glomeruli bracteati 2~4-flori floribus 
4-meris subsessilibus (pedicellis 0.2 mm. longis): bract- 
ene foliosae fere sessiles setoso-serrulatae glabrae. Hy- 
panthium cum calyce glabrum cum glandulis sessilibus 
raducis ornatum: hypanthium 2-2.6X1 mm.; calycts 
lobi 1.2-1.830.6 mm. acuti. Petala ligulata; lamina 
0.7 X<0.6 mm. ovata acuta non setosa: unguis 0.60.2 
mim. longus. Stamina oppositipetala: antherae 1-1.1X 
0.4 mim. (rostro et connectivo exclusi), rostro 0.25 X0.1 
mm. minute (0.06 mm.) uniporoso, connectivo sub anth- 
era 0.8 mim. producto indistincte bilobulato parte ex pansa 
0.3 mm. lata; filamenta 2.2 mm. longa: staminodia de- 
sunt. Ovarium biloculare; stylus 4.5>0.1-0.15 mm. 
apicem versus leviter expansus: stigma truncatum: cap- 
sulum. bivalve: semina ellipsoidea 0.40.2-0.25 mi. 
laxe elongato-areolata. 
Siphanthera Hostmannu (synonymous with iS. Tate: 
Gleason and WS. capitata Gleason) and its poorly distin- 
guished relatives GS. tenera Pohl, S. subtilis Pohl, JS. 
pratensis Met., S. ramosissima Cogn, ex Hoehne, 8. par- 
aensis Huber) all have varying amounts of gland-tipped 
trichomes. The descriptions and illustrations of all ex- 
cept Siphanthera Hostmannu, S. paraensis and iS. ramo- 
sissima omit mention of staminodia. All relatives of JS. 
vaupesana, except S. pratensis and S. subtilis, have wide- 
pored and essentially erostrate anthers. 
CotombBia: Comisaria del Vaupés, Rio Vaupés, Raudal de Yurupari. 
On sand or quartzite base. November, 1951. Richard Evans Schultes 
& Isidoro Cabrera 19723 (Tyrer in N.Y. Bot. Gard. Dupricate type 
in U.S. Nat. Herb. No. 2,195,539). 
My RSINACEAE 
Conomorpha lithophyta FP. 1. Schultes sp. nov. 
Arbuscula saxicola parva, usque ad decem ped. alta, 
pauce ramosa, ramulis junioribus minute albido-tomen- 
tellis, mox glabrescentibus, ramis cortice cinereo cum 
[ 166 ] 
