Abstract
Andreaea sinuosa has no close relatives and is characterized by narrowly lanceolate, ecostate leaves with incurved margins; small spores, 11-21 im, as small as any in the genus; and by basal leaf cells with sinuose walls (as in Racomitrium), which are not known for other ecostate Andreaeae. Very rare and widely disjunct in northwestern North America and northwestern Europe, it occurs in mountainous regions with an oceanic climate on exposed rock, often in snow-beds. A key to ecostate Andreaeae of North America and Europe is provided. During monographic study of the genus Andreaea, I found several collections, most named A. rupestris Hedw., that represent a new species. Andreaea sinuosa B. Murray, sp. nov. (Fig. 1-16) Parva, ecostata; folia anguste lanceolata, margine incurvata; sporae parvae, 11-21 Am diametro. Haec species differt ab omnibus ecostatibus congeneribus parietibus sinuosis cellularum laminae, similibus generi Racomitrio. Plants small, densely tufted but easily broken, green-brown, red-brown, purple-black or black; saxicolous. Protonemata persistent, consisting of stolon-like, yellowish, multiseriate filaments and uniseriate, brown rhizoids; few thallose appendages seen. Stems erect, rarely over 10 mm high, simple to sparingly branched, red-brown, cells frequently sinuose in surface view; in transverse section round, with round, thick-walled cells, central strand absent, outer cells usually slightly smaller than inner, with exterior walls bulging. Axillary hairs frequent, persistent, with 1 (rarely more) brownish, quadrate to short-rectangular basal cell and 1 (rarely more) at first hyaline, later brown, cylindric or clavate terminal cell, with breaks in thin outer wall. Scaleleaves frequent along lower stems, minute, about 0.25-0.30 mm long, lanceolate to ovate, apiculate, occasionally sparsely toothed from projecting cells. Leaves spirally arranged, sometimes appearing tristichous, larger distally, when moist slightly spreading, when dry erect, more or less appressed; narrowly lanceolate to linear-lanceolate, slightly curved to secund, acute or occasionally rounded, to 1.6 mm long, unistratose or with occasional small marginal or laminal bistratose areas; lamina about 22-28 im thick distally, 15-20 im thick proximally; bases oblong, slightly sheathing, narrowed to the straight insertion, usually strongly gibbous on one side only and with a conspicuous fold; margins conspicuously incurved from bases to apices, entire. Costa absent. Upper leaf cells irregularly rounded, oval or oblate, 10-14(16) /m long, 10-12 /m wide, with large, low, brown to white papillae that are more numerous centrally than marginally or apically; walls ? incrassate and collenchymatous, with micropapillae often visible in transverse section due to bulging of walls between adjacent cells. Laminal cells gradually larger and conspicuously pitted to sinuose towards the sheathing base, with papillae over lumina sparse and micropapillae over transverse walls between cells more conspicuous. Basal cells rectangular to oblong, 22-50 im long, 10-12 lim wide, lumina often scalariform, longitudinal walls incrassate, pitted and strongly sinuose, as in Racomitrium, trans0007-2745/86/189-194$0.75/0 This content downloaded from 157.55.39.104 on Mon, 20 Jun 2016 05:36:05 UTC All use subject to http://about.jstor.org/terms 190 THE BRYOLOGIST [Volume 89 .. :., I 4 2o 1-zzr p
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Claims 19
Claim · model-written summary
Andreaea sinuosa is described as a new species without close relatives.
- Taxon
- Andreaea sinuosaAndreaea sinuosae0
- Outcome
- no close relativese0
Verbatim
e0“Andreaea sinuosa has no close relatives”
Claim · model-written summary
The species has narrow lanceolate leaves lacking a costa and bearing incurved margins.
- Taxon
- Andreaea sinuosaAndreaea sinuosat0
- Outcome
- narrowly lanceolate, ecostate leaves with incurved marginse0
Verbatim
e0“narrowly lanceolate, ecostate leaves with incurved margins”
t0“Andreaea sinuosa”
Claim · model-written summary
The spores are small, at 11–21 im.
- Taxon
- Andreaea sinuosaAndreaea sinuosat0
- Outcome
- small sporese0
- Value
- 11-21 ime0
Verbatim
e0“small spores, 11-21 im, as small as any in the genus”
t0“Andreaea sinuosa”
Claim · model-written summary
The basal leaf cells have sinuose walls, unlike other ecostate Andreaeae.
- Taxon
- Andreaea sinuosaAndreaea sinuosat0
- Outcome
- basal leaf cells with sinuose wallse0
Verbatim
e0“basal leaf cells with sinuose walls (as in Racomitrium), which are not known for other ecostate Andreaeae.”
t0“Andreaea sinuosa”
Claim · model-written summary
The species is very rare and has a disjunct distribution in northwestern North America and Europe.
- Taxon
- Andreaea sinuosaAndreaea sinuosat0
- Outcome
- Very rare and widely disjuncte0
- Setting
- northwestern North America and northwestern Europee0
Verbatim
e0“Very rare and widely disjunct in northwestern North America and northwestern Europe”
t0“Andreaea sinuosa”
Claim · model-written summary
The species occupies exposed rock in oceanic mountainous regions, often in snow beds.
- Taxon
- Andreaea sinuosaAndreaea sinuosat0
- Outcome
- occurse0
- Setting
- mountainous regions with an oceanic climate on exposed rock, often in snow-bedse0
Verbatim
e0“it occurs in mountainous regions with an oceanic climate on exposed rock, often in snow-beds.”
t0“Andreaea sinuosa”
Claim · model-written summary
A key to ecostate Andreaeae of North America and Europe was supplied.
- Taxon
- Andreaea sinuosaAndreaea sinuosat0
- Outcome
- A key to ecostate Andreaeaee0
- Comparator
- North America and Europee0
Verbatim
e0“A key to ecostate Andreaeae of North America and Europe is provided.”
t0“Andreaea sinuosa”
Claim · model-written summary
The new species was found among collections identified mostly as A. rupestris.
- Taxon
- Andreaea sinuosaAndreaea sinuosat0
- Outcome
- new speciese0
- Comparator
- A. rupestris Hedw.e0
Verbatim
e0“several collections, most named A. rupestris Hedw., that represent a new species.”
t0“Andreaea sinuosa”
Claim · model-written summary
Plants are small, densely tufted and brittle with dark coloration.
- Taxon
- Andreaea sinuosaAndreaea sinuosat0
- Outcome
- Plants small, densely tufted but easily brokene0
Verbatim
e0“Plants small, densely tufted but easily broken, green-brown, red-brown, purple-black or black; saxicolous.”
t0“Andreaea sinuosa”
Claim · model-written summary
The protonemata persist and have stolon-like filaments and rhizoids.
- Taxon
- Andreaea sinuosaAndreaea sinuosat0
- Outcome
- Protonemata persistent, consisting of stolon-like, yellowish, multiseriate filaments and uniseriate, brown rhizoidse0
Verbatim
e0“Protonemata persistent, consisting of stolon-like, yellowish, multiseriate filaments and uniseriate, brown rhizoids”
t0“Andreaea sinuosa”
Claim · model-written summary
Stems are erect and rarely exceed 10 mm in height.
- Taxon
- Andreaea sinuosaAndreaea sinuosat0
- Outcome
- Stems erecte0
- Value
- 10 mme0
Verbatim
e0“Stems erect, rarely over 10 mm high”
t0“Andreaea sinuosa”
Claim · model-written summary
Scale leaves are frequent on lower stems and about 0.25–0.30 mm long.
- Taxon
- Andreaea sinuosaAndreaea sinuosat0
- Outcome
- Scaleleaves frequent along lower stemse0
- Value
- 0.25-0.30 mme0
Verbatim
e0“Scaleleaves frequent along lower stems, minute, about 0.25-0.30 mm long”
t0“Andreaea sinuosa”
Claim · model-written summary
Leaves are spirally arranged and reach 1.6 mm.
- Taxon
- Andreaea sinuosaAndreaea sinuosat0
- Outcome
- Leaves spirally arrangede0
- Value
- 1.6 mme0
Verbatim
e0“Leaves spirally arranged, sometimes appearing tristichous, larger distally, when moist slightly spreading, when dry erect, more or less appressed; narrowly lanceolate to linear-lanceolate, slightly curved to secund, acute or occasionally rounded, to 1.6 mm long”
t0“Andreaea sinuosa”
Claim · model-written summary
Leaf lamina thickness is about 22–28 im distally.
- Taxon
- Andreaea sinuosaAndreaea sinuosat0
- Outcome
- laminae0
- Value
- 22-28 ime0
- Qualifier
- distallye0
Verbatim
e0“lamina about 22-28 im thick distally, 15-20 im thick proximally”
t0“Andreaea sinuosa”
Claim · model-written summary
Leaf lamina thickness is about 15–20 im proximally.
- Taxon
- Andreaea sinuosaAndreaea sinuosat0
- Outcome
- laminae0
- Value
- 15-20 ime0
- Qualifier
- proximallye0
Verbatim
e0“lamina about 22-28 im thick distally, 15-20 im thick proximally”
t0“Andreaea sinuosa”
Claim · model-written summary
Upper leaf cells are 10–14(16) /m long.
- Taxon
- Andreaea sinuosaAndreaea sinuosat0
- Outcome
- Upper leaf cellse0
- Value
- 10-14(16) /m longe0
Verbatim
e0“Upper leaf cells irregularly rounded, oval or oblate, 10-14(16) /m long, 10-12 /m wide”
t0“Andreaea sinuosa”
Claim · model-written summary
Upper leaf cells are 10–12 /m wide.
- Taxon
- Andreaea sinuosaAndreaea sinuosat0
- Outcome
- Upper leaf cellse0
- Value
- 10-12 /m widee0
Verbatim
e0“Upper leaf cells irregularly rounded, oval or oblate, 10-14(16) /m long, 10-12 /m wide”
t0“Andreaea sinuosa”
Claim · model-written summary
Basal cells are 22–50 im long.
- Taxon
- Andreaea sinuosaAndreaea sinuosat0
- Outcome
- Basal cellse0
- Value
- 22-50 im longe0
Verbatim
e0“Basal cells rectangular to oblong, 22-50 im long, 10-12 lim wide”
t0“Andreaea sinuosa”
Claim · model-written summary
Basal cells are 10–12 lim wide.
- Taxon
- Andreaea sinuosaAndreaea sinuosat0
- Outcome
- Basal cellse0
- Value
- 10-12 lim widee0
Verbatim
e0“Basal cells rectangular to oblong, 22-50 im long, 10-12 lim wide”
t0“Andreaea sinuosa”