A synopsis of the Characeae'

44 BULLETIN OF THE TORREY BOTANICAL CLUB [ VOL. 9149a. Branchlets with 1-3 central axial (along central ray)nodes or furcations.50a. Dactyls 3(-4)-celled ................ 1(73) Nitella cristata [Aust]50b. Dactyls 1-2-celled ................ 2(74) Nitella verticillata [Aust]49b. Branchlets with only 1 node or furcation.51a. Sterile branehlets numerous, 5-12, undivided; dioecious.................................. 3(75) Nitella struthioptila [Af]51b. Sterile branchlets few, 5-6, generally undivided;monoecious ............................. 4(76) Nitella imahorii [As]36i. Small to large; end cells more or less mucronate; dactyls2(-4)-celled; dioecious; with mucus ( / in N. penicillata).[Seem to have features both of sect. Tie ffailenia and sect.Gioallenia] ........................................................... Sect. 9(21) INCERTAE52a. Dactyls 2 (-3 ) -celled ; not clearly mucronate ; mucus I;oogonia 1 at a node; oospore membrane papillate................................................... 1(77) Nitella penicillata [Aust]52b. Dactyls 2-4-celled, clearly mueronate; with thick mucus;oogonia 1 at a node; oospore (........................................................... 2(78) Nitella huillensis [Af]52c. Dactyls 2 (-3) -celled, clearly mucronate ; with mucus ;oogonia 1-2 at a node; oospore membrane reticulate........................................................... 3(79) Nitella doidgeae [Af]IVB. Branchlets monopodial, not furcately divided; rays bilateral, withlaterals differentiated from ab- or adaxial rays; antheridia lateralon adaxial side of branchlet nodes, or at base of whorl; oosporesterete, not compressed; uniformly lime incrusted.[similar to Nitella sect. Migularia, see 36h] ........ Genus II(6) TOLYPELLA53a. End cells or rays allantoid and rounded at tip; coronula deciduous;oogonial convolutions swelling below coronula ............................................................... Sect. 1(22) TOYLPELLA ( Obtusifolia; Allantoideae)............................. 1(80) Tolypella nidifica [Eu, Af, As, Aust, NA, SA]53b. End cells of rays not allantoid; end cell small, conical, sharppointed; coronula persistent; oogonial convolutions not swellingbelow coronula ........ Sect. 2(23) RommA (Acutifolia; Conoideae)...................................... 1(81) Tolypella intricata [Eu, Af, As, NA, SA?]IndexSynonyms are in italics.Acutifolia 53b canescens, C. 2bacuminata, N. 26a capillata, N. 33aAgardhia, sect. of C. 7b eernua, N. 24dsubsect. of C. 9a Ohara IIIAAllantoideae 53a subgen. laallenii, N. 29b sect. 2aAnarthrodactylae 19a subsect. 3aarechavaletae, N. 47e Chareae IAArt hrodactylae 19b, 19c Charinae IIAaxillocarpa, N. 36c Charopsis, subgen. of C. lbbarbatus, Lych. IIIC sect. of C. 7abastinii, N. 28b clavata, N. 24c,baueri, C. 9b congesta, N. 46bBraunia, subsect. of C. 9b eonifera, N. 48cbraunii, C. 8a Conoideae 53bBrownia, sect. of N. 24c corallina, C. 8bbuckellii, C. 14b Corticatae 7bbulbilifera, Nit. 18b eristata, N. 50a