A synopsis of the Characeae'

19641 WOOD: A SYNOPSIS OF THE CHARACEAE 43............... 4(56) Nitella robertsonii [Aust]41b. Upper whorls reduced, forming small whorls isolatedalong a shortened terminal (or axillary)axis resembling an inflorescence; withoutmucus ................ 5(57) Nitella rigida [As, Oct]40b. Small, 2-5(-13) cm. high; branchlets tiny (to 0.5cm. long) ; dense mucus; plant generally moniliform............................. 6(58) Nitella subtilissima [Aust]39b. Oospore membrane clearly reticulate.44a. Branchlets without central secondary ray; heads compact,spheroid, with dense mucus...................................... 7(59) Niteila sphaerocephala [Af]44b. Branchlets with a central secondary ray; withoutheads; no mucus ..................................................................... 8(60) Nitella tenuissima [Eu, Af, As, OA NA]36e. Robust; similar to N. translucens (47a), but heteroclernous ................................................................................... 3(15) Sect. EARTHYA............................................................... 1(61) Nitella axillocarpa [Af]36d. Medium in size; similar to N. gracilis (42b), but heteroclemous............................................................... 4(16) Sect. DECANDOLLEA45a. Accessory branchlets in 2 tiers; monoecious .................................................................................. 1(62) Nitella hyalina [cosm]45b. Accessory branchlets in 1 tier; dioecious.46a. Accessory branchlets few, 1-6(-20) ; whorls ofnormal habit ..................... 2(63) Nitella lhotzkyi [Aust]46b. Accessory branchlets many, c. 40; whorls spheroid,dense, isolated along main axis, moniliform ........................................ 3(64) Nitella congesta [Aust, Oct]36e. Small; similar to N. gracilis (42b), but with dactyls small andfused into 2-3-partite end cell ..................... Sect. 5(17) MUELLERIA................................................................... 1(65) Nitella partita [Aust]36f. Small; upper branchlets each compacted into 1-2 spheroidheads borne terminally on radiating stalklike branches................................................................................... Sect. 6(18) VOGANIA................................................................... 1(66) Nitella tumida [Aust]36g. Robust; brachydactylous; sterile branchlets often appearingto be undivided and terminated with a tiny corona of reduceddactyls; heads tiny and compact, with or withoutmucus .................................................................. Sect. 7(19) PERSOONIA47a. Dactyls 2-celled; without mucus; sterile branchlets 1-2-furcate ........ 1(67) Nitella translucens [Eu, Af, As, NA, SA]47b. Dactyls 1-3-celled.48a. Dactyls (2—)3-celled; axes normal; monoecious ........................................ 2(68) Nitella tricellularis [Aust, Oc]48b. Dactyls 1-3-celled; axes greatly inflated (to 2500 isin diameter) ; dioecious ... 3(69) Nitella praeclara [Af]48c. Dactyls (1—)2(-3)-celled; axes normal; headsspicate, conelike, 1-2 cm. long; dioecious .............................................................. 4(70) Nitella conifera [Af]48d. Dactyls 1(-2)-celled, generally reflexed; dioecious.................................................. 5(71) Nitella dregeana [Af]47c. Dactyls 3-4-celled; monoecious ............................................................................................ 6(72) Nitella arechavaletae [SA]36h. Small to large; branchlets predominately monopodial, withpercurrent central ray and verticillate to bilateral lateralrays at the nodes .......................................... Sect. 8(20) MIGULARIA