HYDROCHARIDACÉES. 199 
nibus alternipetalis 3, fertilibus (marium) v. ad filamenta subulata 
reductis cumque styli ramis linearibus papillosis oppositipetalis, 
integris v. breviter longeve 2-fidis. Ovula basilaria pauca (3!) v. 4- 0 
platentis parietalibus affixa orthotropa; micropyle supera?. Fructus 
oblongus, spatha inclusus v. lateraliter exsertus. Semina 4Â- ce, 
oblonga, pulpa immersa; embryonis conformis gemmula inclusa. 
— Herbæ submersæ valde ramosæ cum ramis radicantibus undique 
foliosæ. Folia 3, 4-natim verticillata, v. inferiora opposita, sessilia. 
Flores * in ramulo axillari, aut brevissimo (subsessiles), aut longiore 
bracteifero, terminales; bracteis lateralibus 2 in spatham tubu- 
losam apiceque 2-dentatam fructumque cingentem connatis. (ame- 
rica calid. et temp.*) 
14. Lagarosiphon HARv.5— Flores (fere Hydrille) diæci; mas-: 
culorum sepalis petaloideis 3, petalisque totidem alternis sæpe: 
minoribus. Stamina fertilia 3, alternipetala; filamentis brevibusi, 
antheris ovatis; additis nunc staminodiis 3, 2. Floris fæminei ger- 
men inferum oblongum, 1-loculare ; perianthio (fere marium) supero.. 
Staminodia parva v. 0. Styli rami stigmatosi intra perianthium 3, 
integri, emarginati v. 2-furcati. Placentæ parietales 3, 1-pauci- 
ownlatæ : ovulis orthotropis suberectis; micropyle supera. Fructus. 
ovoideo-oblongus v. linearis membranaceus. Semina pauca pulpa 
Mucosa immersa orthotropa; funiculo recto; exostomio breviter. 
lubuloso papilloso ; embryone carnoso conformi. — Herbæ sub- 
Mersæ; ramis elongatis gracilibus foliosis. Folia alterna, linearia 
V. selacea integra, pe v. serrulata. Flores axillares : masculi. 
in spatha sessili, apice 2-fida, œæ, minute pedicellati; fœminei in 
Spatha axillari 6 cblonga angusta, NRC fissa, solitarit. (/ndiæ, Africe 
(r0p. cont. et insul. aque "dibes A 
je, don “des vix prominulis (viridibus) an area Zeit. (1870, 88; in Prin, Jahrb., 
ersaoti , 903; in Schweinf. Beitr. FI. iop., 200, 
. Itegumen nto duplici. 4 4; in AU. Naturw. Ve. Dren. ui 252, 
: rage rosei, parvi. t. 18. — B. H., Gen., IIL, 450, n. 8 (part.). — 
ae Spec. 7, 8. Retcup., Je. FL. germi., t. 59  ASCH. et GRKE, Pansenfan. ,251, fig. 184, C,H. 
x a . D PL. ie Asn.oe. nat., sér. 3, 6. Spathæ nunc 2-natæ 
Mic (Anacharis), 15 (Apalanthe), t. 1. — 7. Spec. 8, 9. Hook. F., F1. Me Ind., v, 
Px, FL. bor-amer., 1, 20. — H. B., PI. 659. — Rip. in Journ. Linn. Sos, XXII, 233. 
ane, IL, 150 Genus A, ca cum Pi nonnihil 
In Hook. Journ. Bot., IV, 230, t. 22.—  connectens 
