SAGITTARIA . ALISMACEÆ (AUCT. M. MICHELI). 79 
In stagnis Brasiliæ mediterraneæ tropicæ (Martius in herb. 
Monac. ). 
?11. S. Lagoensis (Seub. et Warming in Warm. Symbol. ad 
flor. Bras. centr. part. 13, 1872, p. 345, tab. 2). 
Species mihi specimine unico imperfecte nota, Sag. pugioniformi im- 
primis affinis, a qua differt carpellis immaturis rostratis. Cl. Warmingii 
deseriptionem huc transcribo : Herba erecta, glabra, foliis haud fluitan- 
tibus, ad 3 pedes alta, rhizomate brevissimo lactescente. Folia longe 
petiolata, basi valde cellulosa, vaginantia; vagina non clausa, c. 20 
cent. longa; petiolus supra vaginam teres, apice sensim tenuior, trans- 
verse septatus, 30-35 cent. longus. Lamina lanceolata, latitudine maxi- 
ma infra medium tamen sita, apice longe subacuminata, basi acuta, 
20-25 cent. longa, c. 6 cent. lata, costarum lateralium paribus c. 5-6, 
plerisque (4-5) ab ipsa basi, una paullo infra medium laminæ a costa 
media exeunte, omnibus simplicibus et costulis transversalibus tenuis- 
simis parallelis sub angulis acutis inter se junctis. Inflorescentiæ 
pedunculus simplex, 1-2 pedes longus, in vivo c. 8 mill. crassus, teres 
vel apice triangulatus, lacunosus; flores in verticillos ternatos 4-6 et 
forte plures, internodiis 3-6 cent. longis, triangulatis ab invicem remo- 
tos, imum foemineum summos masculos dispositi. Bracteæ ternatæ, 
basi connatæ, anguste et elongate ovatæ vel ovato-lanceolatæ, apice 
obtuse v. subrotundatæ, dorso obtuse-carinatæ, glabræ, ad flores 
Ícemineos 3 */,-5 cent. longæ et vix 2 cent. latæ, ad flores masculos 
3-3 */, cent. longe et c. 12-15 mill. latæ, virides margine tenuissime 
rubescente. Flores masculi verticillos summos occupantes, pedunculis 
tenuibus (c. 1 mill. crassis), 3-4 cent. longis bracteasque igitur supe- 
rantibus insident. Sepala ovato-oblonga, valde concava, dorso 1otun- 
data, apice obtusa, e. 1 ‘/, cent. longa et c. 6 mill. lata (inter mar- 
gines sepali haud fissi metienti, explanata c. 8-9 mill. lata). Corolla 
calyce e. duplo longior ; petala triangulari-obovato-orbicularia, can- 
dida, basi flava. Stamina 10-12; filamenta c. 1 cent. longa, planiuscula, 
basi 1 mill. fere lata, apice sensim angustiora, glabra. Antheræ fila- 
mentis paullo breviores. Flores feminei in infimo verticillo pedicellis 
^. 1 cent. crassis, 2-2 Y, cent. longis et igitur bracteis brevioribus, 
Strictis fulti, bracteas tamen ipsi superantes. Sepala ovato-orbicu- 
laria, apice obtusissima, c. 2 cent. longa et lata, viridia margine rubes- 
cente. Petala obovato-orbicularia, 3 */,-4 cent. longa et fere totidem 
lata, sepala duplo igitur superantia, candida, dimidio inferiore flavo. 
'amina sterilia plura adsunt. Ovaria numerosissima in receptaculo 
