Updated June 10th: In the June 11th Postal Bulletin, the USPS says the paper type for both versions is actually “Paper Type: Non-phosphor Type III, Overall Tagged,” not what was listed below.

Scott catalogue numbers:
4973 (49¢) Soft Shield Fern lithographed coil stamp with Microprinted “USPS” and “2014”
date
4974 (49¢) Autumn Fern lithographed coil stamp with Microprinted “USPS”
and “2014” date
4975 (49¢) Goldie’s Wood Fern lithographed coil stamp with Microprinted
“USPS” and “2014” date
4976 (49¢) Painted Fern lithographed coil stamp with Microprinted
“USPS” and “2014” date
4977 (49¢) Fortune’s Holly Fern lithographed coil stamp with Microprinted “USPS” and “2014” date
a. Strip of 5, #4973-4977

4973a (49¢) Soft Shield Fern lithographed coil stamp with Microprinted “USPS” and “2015” date
4974a (49¢) Autumn Fern lithographed coil stamp with Microprinted “USPS” and “2015” date
4975a (49¢) Goldie’s Wood Fern lithographed coil stamp with Microprinted “USPS” and “2015” date
4976a (49¢) Painted Fern lithographed coil stamp with Microprinted “USPS” and “2015” date
4977a (49¢) Fortune’s Holly Fern lithographed coil stamp with Microprinted “USPS” and “2015” date
4977c Strip of 5, #4973a-4977a

Updated March 4th: From the Postal Bulletin:

On March 27, 2015, in Kansas City, MO, the U.S. Postal Service® will issue Ferns First-Class Mail® stamps (Forever® priced at 49 cents) in five designs, in a pressure-sensitive adhesive (PSA) coil of 3,000 (Item #786700) along with a reprint of the coil of 10,000 (Item #777300). The 3k coil has a 2015 date in the upper right corner of the stamps and the 10k coil has a 2014 date in the lower left corner of the stamps.

The stamps will go on sale nationwide March 27, 2015.

First issued in 2014, these five stamps celebrate the beauty and elegance of ferns. Each of these stamps depicts a close-up photograph of a different species of fern —autumn fern, Goldie’s wood fern, soft shield fern, For­tune’s holly fern, or painted fern. The shapes and textures of the fronds stand out against a stark white background, which highlights the placement of the leaflets along each fern’s stem. Art director Phil Jordan designed the stamps using existing images by photographer Cindy Dyer.

How to Order the First-Day-of-Issue Postmark:
Customers have 60 days to obtain the first-day-of-issue postmark by mail. They may purchase new stamps at their local Post Office, at The Postal Store® website at www.usps.com/shop, or by calling 800-STAMP-24. They should affix the stamps to envelopes of their choice, address the envelopes (to themselves or others), and place them in a larger envelope addressed to:

Ferns Stamps (3k and 10k PSA Coils)
Cancellation Services
8300 NE Underground Drive, Pillar 210
Kansas City, MO 64144-0001

After applying the first-day-of-issue postmark, the Postal Service™ will return the envelopes through the mail. There is no charge for the postmark up to a quantity of 50. For more than 50, customers have to pay five cents each. All orders must be postmarked by May 26, 2015.

There is one philatelic product for the coil of 3,000:

• 786716 First-Day Cover set of 5, $4.65

There is one philatelic product for the coil of 10,000:

• 777317 First-Day Cover set of 5, $4.65

Technical Specifications:

Issue: Ferns Stamps
Item Number: 786700
Denomination & Type of Issue: First-Class Mail Forever
Format: Coil of 3,000 (5 designs)
Series: N/A
Issue Date & City: March 27, 2015, Kansas City, MO 64108
Art Director: Phil Jordan, Falls Church, VA
Designer: Phil Jordan, Falls Church, VA
Typographer: Phil Jordan, Falls Church, VA
Existing Photos: Cindy Dyer, Alexandria, VA
Modeler: Donald Woo
Manufacturing Process: Offset, Microprint
Printer: Banknote Corporation of America/SSP
Printed at: Browns Summit, NC
Press Type: Alprinta 74
Stamps per Coil: 3,000
Print Quantity: 45 million stamps
Paper Type: Phosphor Tagged Paper, Overall
Adhesive Type: Pressure-sensitive adhesive
Processed at: Banknote Corporation of America, Browns Summit, NC
Colors: Cyan, Magenta, Yellow, Black
Stamp Orientation: Vertical
Image Area (w x h): 0.73 x 0.84 in./18.54 x 21.34 mm
Stamp Size (w x h): 0.87 x 0.98 in./22.10 x 24.89 mm
Plate Size: 250 stamps per revolution
Plate Numbers: “S” followed by four (4) single digits
Coil Number Frequency: Plate numbers every 25th stamp below stamp image

Technical Specifications:

Issue: Ferns Stamps
Item Number: 777300
Denomination & Type of Issue: First-Class Mail Forever
Format: Coil of 10,000 (5 designs)
Series: N/A
Issue Date & City: March 27, 2015, Kansas City, MO 64108
Art Director: Phil Jordan, Falls Church, VA
Designer: Phil Jordan, Falls Church, VA
Typographer: Phil Jordan, Falls Church, VA
Existing Photos: Cindy Dyer, Alexandria, VA
Modeler: Donald Woo
Manufacturing Process: Offset, Microprint
Printer: Banknote Corporation of America/SSP
Printed at: Browns Summit, NC
Press Type: Alprinta 74
Stamps per Coil: 10,000
Print Quantity: 100 million stamps
Paper Type: Phosphor Tagged Paper, Overall
Adhesive Type: Pressure-sensitive adhesive
Processed at: Banknote Corporation of America, Browns Summit, NC
Colors: Cyan, Magenta, Yellow, Black
Stamp Orientation: Vertical
Image Area (w x h): 0.73 x 0.84 in./18.54 x 21.34 mm
Stamp Size (w x h): 0.87 x 0.98 in./22.10 x 24.89 mm
Plate Size: 250 stamps per revolution
Plate Numbers: “S” followed by four (4) single digits
Coil Number Frequency: Plate numbers every 25th stamp below stamp image

From the USPS Conference Call on February 20th: Reprint, PSA Coils of 3,000 or 10,000, no event, KC first day (Forever design) one has a 2015 predate, one doesn’t, USPS is checking, new printer, Sennett, using offset; last printer was CCL in gravure. March 27th, Kansas City, no ceremony.