A synopsis of the Characeae'

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38 BULLETIN OF THE TORREY BOTANICAL CLUB[ VOL. 917a. Totally ecorticate ....................... Sect. 1(4) CHAROPSIS (Ecorticatae)8a. Branchlets with terminal corona of reduced bract-cells;stipulodes and bract-cells well formed; gametangiaabsent from base of whirl; monoecious................................. 1(9) Chara braunii [nearly cosm]8b. Branchlets with either a terminal mucro or corona ;stipulodes and bract-cells generally rudimentary;gametangia at either base of whorl and/or atbranchlet nodes; monoecious or dioecious .......................................... 2(10) Chara corallina [ Af, As, Aust, Oc]Sc. Branchlets with terminal mucro, but not a corona ;stipulodes and bract-cells rudimentary ; gametangiaabsent from base of whorl; monoeordioecious ................... 3(11) Chara socotrensis [Af, As]i7b. Axes corticated ............................ Sect. 2 (5 ) AGARDHIA (Corticatae)9a. Branchlets corticate or ecorticate, without terminalcoronula of reduced bract-cells .... Subsect. 1(6) AGARDTHA10a. Stipulodes in 1 tier; branchlets with or withoutcortication.ha. Stipulodes (and bract-cells) tapering; stipulodes1-2 per branchlet, alternate.12a. Basal branchlet segment not inflated;axes 1-3 cortieate.13a. Gametangia restricted to branchlets............................ 1(12) Charafibrosa [ Af, As, Aust, 0c, NA, SA]13b. Gametangia also at base of whorl.............. 2(13) Chara leptopitys [ Aust]12b. Basal branchlet segment of upperbranchlets inflated with storedfood; axes 1-corticate ......................................... 3(14) Chara submollusca [ Aust]11b. Stipulodes and bract-cells large and cylindrical,blunt (i.e., allantoid) ; stipulodes1 per branchlet, opposite (i.e.,below branchlet) ....... 4(15) Chara ecklonii [Af]10b. Stipulodes in 2 tiers; branchlets with 3-4-corticatedsegments ..................................................................................... 15 (116) Chara pseudohydropitys [As][Placed here despite the 2-tiered stipulodes.Entries also occur at 4b and 5c.]91). Branchlets ecorticate, with terminal corona of reducedbract-cells; medium to small in size (to 30 cm.high) ......................................................... Subsect. 2(7) BR k UNIA..... 1 (17 ) Chara baueri [Eu, Aust ; to be expected in As]9c. Branchlets ecortieate, without a corona ; plants robust,often 50(-60) cm. high ............. Subsea. 3(8) WALLAIANIA14a. Medium to large (to 60 cm. high) ; stipulodes2 per branehlet; end segment 1-celled;bract-cells spreading ................................................................................. 1(18) Chara hornemannii [NA, SA]14b. Small to medium (to 15 cm.) ; stipulodes 1 perbranchlet ; end segment commonly 2-celled;lower bract-cells often decumbent .................................................................. 2(19) Chara buckellii [NA]1 for var. bulbilifera (in Wood, 1962: 13), see Nitellopsis belbilifera, 18b.
19641 WOOD: A SYNOPSIS OF THE CHARACEAE 39IIIB. Without cortex; stipulodes in 1 tier (rarely irregular, sparse orabsent, see 15b), 1 per branchlet, opposite (i.e., below eachbranchlet), strongly decumbent ; monoecious; gametangia froma single peripheral cell, and when conjoined generally withoogonium below (position varies in 15b) antheridium ..................................................................................... Genus II(2) LAMPROTHAMNIUM15a. Stipulodes well developed, uniform; oogonia below antheridia.16a. Branehlet segments 4-5 (i.e., 3-4 nodes) ; gametangia atbranchlet nodes and at base of whorl .............................................. 1(20) Lamp. papulosum [Eu, Af, As, Aust, Oc]16b. Branchlet segments 3(-4) ; gametangia not at base ofwhorl ................................................... 2(21) Lamp. hansenii [Eu]15b. Stipulodes irregular, small, some vestigial or absent; oogoniumposition variable, below, beside or above antheridium...................................... 3(22) Lamp. succinctum [ Af, As, Aust, Oc]IIIC. With or without cortex; stipulodes in 1 tier, 2 per branchlet,spreading; monoecious; gametangia each from a separateperipheral nodal cell, generally with central oogonium flankedby 2 lateral antheridia ............................. Genus III(3) LYCHNOTHAMNUS....................................................... 1(23) Lych. barbatus [Eu, Af, As, Aust]IIB. Stipulodes absent or rudimentary; bract-cells normally 2 at a node(occasionally 1 or 3), anterior only, similar in size and shape tobranchlet segment; branchlet segments 2-5; ecortieate; dioecious;bulbils developed, 1- or more-celled; coronular cells spheroid................................................................................. Subtribe II(2) NITELLOPSINAE.............................................................................................. Genus 1(4) NITELLOPSIS17a. Fertile branchlets with 2-3 segments (i.e., 1-2 nodes) ; branchletswithout terminal mucro; bulbils multicellular (stellate).................................................................... 1(24) Nit. obtusa [Eu, As, NA?]17b. Fertile branchlets with 3-5 segments; with or without terminalmucro; bulbils 1-celled (I).18a. Sterile branehlets with 3-4 segments, without terminal mucro;1 bract-cell at a branchlet node; bulbils (I) ............................................................................................. 2(25) Nit. sarcularis [As]18b. Sterile branchlets with 4-5 segments, with short terminalmucro; 1-2 bract-cells at a node; bulbils 1-celled ..................................................................................... 3(26) Nit. bulbilifera [SA]IB. Coronula of 10 cells in 2 tiers; coronula small; branchlets divided, furcate orif monopodial then with lateral rays 2-more-celled ............ Tribe 1(2) NITELLEAEIVA. Branchlets furcate (occasionally with central ray) ; rays verticillate ;antheridia terminal on the end of branchlet rays (or at base ofwhorl) ; oospores laterally compressed; generally without evidentlime, or if present, usually in bands or at dactyl tips. [but see Sect.Migularia, 36h, which nearly matches IVB] ................ Genus I(5) NITELLA19a. Dactyls 1-celled (except N. Inacounii [NA], 21b; N. hookeri [Aust,Oc], 23c) ............................. Subgen. 1(3) NITELLA (Anarthrodactylae)20a. Dactyls obtuse or acute, not acuminate; oogonial convolutionsswelling at maturity ............................................... Sect. 1(6) NITELLA21a. Dactyls 1-celled; branchlets 1 (-2) -furcate.22a. Without mucus; gametangia 1-2(-3) at branchletnodes, sessile ...............................................................1(27) Nitella flexilis [Eu, Af, As, Aust?, NA, SA]22b. With mucus; gametangia 2-3 at branchlet nodes,also stipitate at base of whorl ..................................................................................... 2(28) Nitella mirabilis [As]21b. Dactyls 1 (-2-3) -celled, branchlets (1—) 2 (-3) -furcate............................................................ 3(29) Nitella macounii [NA]
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A synopsis of the Characeae'

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